TY  - CONF
AU  - Jevremović, Aleksandar M.
AU  - Kandić, Aleksandar
AU  - Đurašević, Mirjana M.
AU  - Vukanac, Ivana
AU  - Čeliković, Igor T.
AU  - Milošević, Zoran
AU  - Puzović, Jovan
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8460
AB  - The coincidence summing effect plays an important role in HPGe spectrometry, especially at low source-detector distances, due to a large solid angle; therefore, the calculation of correction factors is necessary. The aim of the research described in this paper was to compare values of correction factors for a 22Na point source obtained using the GESPECOR software package (Monte-Carlo method) and experimentally obtained values. Measurements were performed using a semiconductor HPGe spectrometer and the point source axially positioned at nine different distances from the detector end-cap. For the purpose of determining correction factors, a system of equations was formed, which, besides nuclear data as the input parameters, uses the experimentally obtained values of the total count in the entire spectrum, as well as the counts in the full energy peaks. The system of equations was solved for each particular case and correction factors were determined. By comparing the results obtained using the experimental and Monte-Carlo method, it was found that the correction factors for the 22Na point source have discrepancies less than 3%. The significance of these discrepancies was also verified from a statistical point of view using a Student's t-test. © 2019 RAD Association. All rights reserved.
C3  - RAD Conference Proceedings
T1  - Determination of coincidence summing correction factors for 22na point source
VL  - 3
SP  - 32
EP  - 35
DO  - 10.21175/RadProc.2018.07
ER  - 

@conference{
author = "Jevremović, Aleksandar M. and Kandić, Aleksandar and Đurašević, Mirjana M. and Vukanac, Ivana and Čeliković, Igor T. and Milošević, Zoran and Puzović, Jovan",
year = "2018",
abstract = "The coincidence summing effect plays an important role in HPGe spectrometry, especially at low source-detector distances, due to a large solid angle; therefore, the calculation of correction factors is necessary. The aim of the research described in this paper was to compare values of correction factors for a 22Na point source obtained using the GESPECOR software package (Monte-Carlo method) and experimentally obtained values. Measurements were performed using a semiconductor HPGe spectrometer and the point source axially positioned at nine different distances from the detector end-cap. For the purpose of determining correction factors, a system of equations was formed, which, besides nuclear data as the input parameters, uses the experimentally obtained values of the total count in the entire spectrum, as well as the counts in the full energy peaks. The system of equations was solved for each particular case and correction factors were determined. By comparing the results obtained using the experimental and Monte-Carlo method, it was found that the correction factors for the 22Na point source have discrepancies less than 3%. The significance of these discrepancies was also verified from a statistical point of view using a Student's t-test. © 2019 RAD Association. All rights reserved.",
journal = "RAD Conference Proceedings",
title = "Determination of coincidence summing correction factors for 22na point source",
volume = "3",
pages = "32-35",
doi = "10.21175/RadProc.2018.07"
}

Jevremović, A. M., Kandić, A., Đurašević, M. M., Vukanac, I., Čeliković, I. T., Milošević, Z.,& Puzović, J.. (2018). Determination of coincidence summing correction factors for 22na point source. in RAD Conference Proceedings, 3, 32-35.
https://doi.org/10.21175/RadProc.2018.07

Jevremović AM, Kandić A, Đurašević MM, Vukanac I, Čeliković IT, Milošević Z, Puzović J. Determination of coincidence summing correction factors for 22na point source. in RAD Conference Proceedings. 2018;3:32-35.
doi:10.21175/RadProc.2018.07 .

Jevremović, Aleksandar M., Kandić, Aleksandar, Đurašević, Mirjana M., Vukanac, Ivana, Čeliković, Igor T., Milošević, Zoran, Puzović, Jovan, "Determination of coincidence summing correction factors for 22na point source" in RAD Conference Proceedings, 3 (2018):32-35,
https://doi.org/10.21175/RadProc.2018.07 . .

TY  - CONF
AU  - Đurašević, Mirjana M.
AU  - Kandić, Aleksandar
AU  - Milinčić, Miroljub
AU  - Vukanac, Ivana
AU  - Jevremović, Aleksandar M.
AU  - Milošević, Zoran
AU  - Lončar, Boris B.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8315
UR  - https://plus.sr.cobiss.net/opac7/bib/245691404
UR  - http://dzz.org.rs/wp-content/uploads/2013/06/Zbornik_XXIX_Simpozijum_DZZ_SCG_Srebrno_jezero_2.pdf
AB  - Gamaspektrometrija je jedna od najčešće korišćenih metoda za kvalitativno i
kvantitativno određivanje sadržaja radionuklida u zemljištu i drugim uzorcima iz
životne sredine. Meren je 31 uzorak zemljišta sa teritorije opštine Aleksandrovac, pri
čemu su za svaki uzorak korišćene dve različite geometrije (cilindrična kutijica i
marineli posuda). Određene su specifične aktivnosti radioizotopa uranovog i torijumovog niza, kao i 235U, 40K i 137Cs. Uzorci zemlje u geometriji cilindrične kutijice mereni
sa na dva HPGe detektora različitih efikasnosti i karakteristika, dok su uzorci u
marineli posudi mereni samo na jednom HPGe detektoru. U radu su prikazani rezultati
poređenja specifičnih aktivnosti istih radionuklida dobijenih merenjem uzoraka u
različitim geometrijama na istom HPGe detektoru kao i uzoraka u geometriji
cilindrične kutijice merenih na različitim detektorima. Analizirani su uzroci nastalih
varijacija.
AB  - Gamma ray spectrometry is an analytical method that allows the identification and
quantification of gamma emitting radioisotopes in soil and other environmental
samples. 31 samples of soil were collected from different location in the territory of
Aleksandrovac municipality. All soil samples were dried, milled and sealed in two
different geometries (500 ml Marinelli beaker and 125 ml cylindrical boxes) and stored
for six weeks in order to reach radioactive equilibrium between 226Ra and its
descendants. All samples stored in cylindrical boxes were measured by means of two
coaxial semiconductor HPGe detectors with different characteristics, while samples
stored in Marinelli beakers were measured only by means of one coaxial semiconductor
HPGe detector. The activity concentrations of radionuclides 40K, 137Cs, 235U, 226Ra, 238U
and 228Ac in all soil samples were determined. Variations in specific activities
determination for different geometries measured using one of the detectors, as well as
for cylindrical box geometry measured using both detectors, are presented in this
paper. The causes of these variations are analyzed.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Varijacije pri određivanju specifičnih aktivnosti u uzorcima zemljišta za različite geometrije i HPGe detektore
T1  - Variations in specific activities determination in soil samples for different geometries and HPGe detectors
SP  - 462
EP  - 466
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8315
ER  - 

@conference{
author = "Đurašević, Mirjana M. and Kandić, Aleksandar and Milinčić, Miroljub and Vukanac, Ivana and Jevremović, Aleksandar M. and Milošević, Zoran and Lončar, Boris B.",
year = "2017",
abstract = "Gamaspektrometrija je jedna od najčešće korišćenih metoda za kvalitativno i
kvantitativno određivanje sadržaja radionuklida u zemljištu i drugim uzorcima iz
životne sredine. Meren je 31 uzorak zemljišta sa teritorije opštine Aleksandrovac, pri
čemu su za svaki uzorak korišćene dve različite geometrije (cilindrična kutijica i
marineli posuda). Određene su specifične aktivnosti radioizotopa uranovog i torijumovog niza, kao i 235U, 40K i 137Cs. Uzorci zemlje u geometriji cilindrične kutijice mereni
sa na dva HPGe detektora različitih efikasnosti i karakteristika, dok su uzorci u
marineli posudi mereni samo na jednom HPGe detektoru. U radu su prikazani rezultati
poređenja specifičnih aktivnosti istih radionuklida dobijenih merenjem uzoraka u
različitim geometrijama na istom HPGe detektoru kao i uzoraka u geometriji
cilindrične kutijice merenih na različitim detektorima. Analizirani su uzroci nastalih
varijacija., Gamma ray spectrometry is an analytical method that allows the identification and
quantification of gamma emitting radioisotopes in soil and other environmental
samples. 31 samples of soil were collected from different location in the territory of
Aleksandrovac municipality. All soil samples were dried, milled and sealed in two
different geometries (500 ml Marinelli beaker and 125 ml cylindrical boxes) and stored
for six weeks in order to reach radioactive equilibrium between 226Ra and its
descendants. All samples stored in cylindrical boxes were measured by means of two
coaxial semiconductor HPGe detectors with different characteristics, while samples
stored in Marinelli beakers were measured only by means of one coaxial semiconductor
HPGe detector. The activity concentrations of radionuclides 40K, 137Cs, 235U, 226Ra, 238U
and 228Ac in all soil samples were determined. Variations in specific activities
determination for different geometries measured using one of the detectors, as well as
for cylindrical box geometry measured using both detectors, are presented in this
paper. The causes of these variations are analyzed.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Varijacije pri određivanju specifičnih aktivnosti u uzorcima zemljišta za različite geometrije i HPGe detektore, Variations in specific activities determination in soil samples for different geometries and HPGe detectors",
pages = "462-466",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8315"
}

Đurašević, M. M., Kandić, A., Milinčić, M., Vukanac, I., Jevremović, A. M., Milošević, Z.,& Lončar, B. B.. (2017). Varijacije pri određivanju specifičnih aktivnosti u uzorcima zemljišta za različite geometrije i HPGe detektore. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 462-466.
https://hdl.handle.net/21.15107/rcub_vinar_8315

Đurašević MM, Kandić A, Milinčić M, Vukanac I, Jevremović AM, Milošević Z, Lončar BB. Varijacije pri određivanju specifičnih aktivnosti u uzorcima zemljišta za različite geometrije i HPGe detektore. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:462-466.
https://hdl.handle.net/21.15107/rcub_vinar_8315 .

Đurašević, Mirjana M., Kandić, Aleksandar, Milinčić, Miroljub, Vukanac, Ivana, Jevremović, Aleksandar M., Milošević, Zoran, Lončar, Boris B., "Varijacije pri određivanju specifičnih aktivnosti u uzorcima zemljišta za različite geometrije i HPGe detektore" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):462-466,
https://hdl.handle.net/21.15107/rcub_vinar_8315 .

TY  - CONF
AU  - Jevremović, Aleksandar M.
AU  - Kandić, Aleksandar
AU  - Đurašević, Mirjana M.
AU  - Vukanac, Ivana
AU  - Šešlak, Bojan Ž.
AU  - Milošević, Zoran
AU  - Puzović, Jovan
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8331
UR  - https://plus.sr.cobiss.net/opac7/bib/245691404
UR  - http://dzz.org.rs/wp-content/uploads/2013/06/Zbornik_XXIX_Simpozijum_DZZ_SCG_Srebrno_jezero_2.pdf
AB  - У гама спектрометрији се често сусрећемо са ефектом коинцидентног
сумирања, а самим тим постоји потреба за одређивањем корекционих фактора.
Циљ истраживања описаног у овом раду је поређење вредности корекционих
фактора за тачкасти извор
88Y добијених помоћу софтверског пакета
GESPECOR (Монте Карло методом) и експериментално добијених вредности.
Мерења су обављена помоћу полупроводничког HPGe спектрометра, при чему је
тачкасти извор био позициониран на аксијалној оси детектора на девет
различитих растојања од капе детектора. Формиран је систем једначина, који
осим нуклеарних података, као улазне параметре користи и експериментално
добијене вредности тоталног одброја у целом спектру, као и одброја испод
фотопикова. На основу решавања система једначина одређени су корекциони
фактори за коинцидентно сумирање. Упоређивањем резултата, утврђено је да
се вредности корекционих фактора добијених помоћу ове две методе разликују до
3 %.
AB  - In gamma ray spectrometry often deals with coincidence summing effect, and therefore
calculation of correction factors is necessary. Coincidence summing effect play an
important role in HPGe spectrometry at low source-detector distances, due to the large
solid angle subtended by the detector at the source. The aim of research described in
this paper was to compare values of correction factors for point source 88Y obtained
using the software package GESPECOR (Monte-Carlo method) and experimentally
obtained values. Measurements were performed using a semiconductor HPGe
spectrometer, wherein point source was axially located on detector at nine different
distances. The system of equations was formed whereas net areas in full energy peaks
as well as in entire spectrum were used as input data. The system was solved and
correction factors for point source 88Y were determined. By comparing the obtained
values, it was found that correction factors obtained by these two methods have
discrepancy less than 3 %.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Одређивање корекционих фактора за коинцидентно сумирање у случају тачкастог извора Y88
T1  - Determination of coincidence summing correction factors for Y88 point source
SP  - 574
EP  - 578
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8331
ER  - 

@conference{
author = "Jevremović, Aleksandar M. and Kandić, Aleksandar and Đurašević, Mirjana M. and Vukanac, Ivana and Šešlak, Bojan Ž. and Milošević, Zoran and Puzović, Jovan",
year = "2017",
abstract = "У гама спектрометрији се често сусрећемо са ефектом коинцидентног
сумирања, а самим тим постоји потреба за одређивањем корекционих фактора.
Циљ истраживања описаног у овом раду је поређење вредности корекционих
фактора за тачкасти извор
88Y добијених помоћу софтверског пакета
GESPECOR (Монте Карло методом) и експериментално добијених вредности.
Мерења су обављена помоћу полупроводничког HPGe спектрометра, при чему је
тачкасти извор био позициониран на аксијалној оси детектора на девет
различитих растојања од капе детектора. Формиран је систем једначина, који
осим нуклеарних података, као улазне параметре користи и експериментално
добијене вредности тоталног одброја у целом спектру, као и одброја испод
фотопикова. На основу решавања система једначина одређени су корекциони
фактори за коинцидентно сумирање. Упоређивањем резултата, утврђено је да
се вредности корекционих фактора добијених помоћу ове две методе разликују до
3 %., In gamma ray spectrometry often deals with coincidence summing effect, and therefore
calculation of correction factors is necessary. Coincidence summing effect play an
important role in HPGe spectrometry at low source-detector distances, due to the large
solid angle subtended by the detector at the source. The aim of research described in
this paper was to compare values of correction factors for point source 88Y obtained
using the software package GESPECOR (Monte-Carlo method) and experimentally
obtained values. Measurements were performed using a semiconductor HPGe
spectrometer, wherein point source was axially located on detector at nine different
distances. The system of equations was formed whereas net areas in full energy peaks
as well as in entire spectrum were used as input data. The system was solved and
correction factors for point source 88Y were determined. By comparing the obtained
values, it was found that correction factors obtained by these two methods have
discrepancy less than 3 %.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Одређивање корекционих фактора за коинцидентно сумирање у случају тачкастог извора Y88, Determination of coincidence summing correction factors for Y88 point source",
pages = "574-578",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8331"
}

Jevremović, A. M., Kandić, A., Đurašević, M. M., Vukanac, I., Šešlak, B. Ž., Milošević, Z.,& Puzović, J.. (2017). Одређивање корекционих фактора за коинцидентно сумирање у случају тачкастог извора Y88. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 574-578.
https://hdl.handle.net/21.15107/rcub_vinar_8331

Jevremović AM, Kandić A, Đurašević MM, Vukanac I, Šešlak BŽ, Milošević Z, Puzović J. Одређивање корекционих фактора за коинцидентно сумирање у случају тачкастог извора Y88. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:574-578.
https://hdl.handle.net/21.15107/rcub_vinar_8331 .

Jevremović, Aleksandar M., Kandić, Aleksandar, Đurašević, Mirjana M., Vukanac, Ivana, Šešlak, Bojan Ž., Milošević, Zoran, Puzović, Jovan, "Одређивање корекционих фактора за коинцидентно сумирање у случају тачкастог извора Y88" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):574-578,
https://hdl.handle.net/21.15107/rcub_vinar_8331 .

TY  - CHAP
AU  - Vukanac, Ivana
AU  - Bogojević, Suzana A.
AU  - Đurašević, Mirjana M.
AU  - Kandić, Aleksandar
AU  - Milošević, Zoran
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7841
UR  - http://www.vbs.rs/scripts/cobiss?command=DISPLAY&base=99999&rid=226685452&fmt=11&lani=sc
UR  - http://dzz.org.rs/wp-content/uploads/2013/06/30-godina-Cernobilja-monografija-1.pdf
AB  - Током друге половине двадесетог века у циљу редовног праћења концентрације радионуклида у аеросолима, вршена су узорковања ваздуха на четири места на локацији Института за нуклеарне науке „Винча“. У време узорковања одређивана је укупна бета активност дневних узорака аеросола на филтер папиру. Како је бета спектрометрија/бројање недеструктивна метода исти узорци су касније искоришћени за алфаспектрометријска мерења. У узорцима ваздуха из периода интензивних надземних нуклеарних проба, као и из периода непосредно након чернобиљског акцидента, током 90-тих година двадесетог века у Лабораторији за нуклеарну и плазма физику одређивана је концентрација изотопа плутонијума алфаспектрометријском методом. Узорковање ваздуха вршено је помоћу пумпе са филтерима. Две године након Чернобиља узорци ваздуха прикупљани током маја 1986. године, су прво мерени на полупроводничком HPGe спектрометру и
детектовани су следећи вештачки радионуклиди: 137Cs, 134Cs, 106Ru, 125Sb, 144Ce и 110mAg. Максималне концентрације цезијумових изотопа детектоване су у периоду 02-03. маја, док је други максимум детектован 06. маја. Након гамаспектрометријских, урађена су и алфаспектрометријска мерења. Максималне концентрације 238Pu и 239,240Pu детектоване су у периоду 01-07. маја 1986. године, што одговара хронолошки максимално измереним концентрацијама цезијума. Добијени резултати били су у сагласности са доступним резултатима измереним на локацијама Прага, Минхена и Париза за исти временски период. У узорцима сакупљаним током 1987. и 1989. године, концентрације изотопа плутонијума биле су на граници детекције, осим у пролећном периоду када има највише падавина. Непосредно након чернобиљског акцидента, највећи допринос укупној активности плутонијума у околини потицао је од 241Pu, чистог бета емитера. Мерење овог изотопа може се вршити течним сцинтилационим детектором или масеним спектрометром, који нису били доступни у Институту, те овај радионуклид није ни мерен. Међутим, исти електродепоновани алфа извори плутонијума, припремани почетком деведесетих година прошлог века, поново су мерени алфаспектрометријски током 2004. и 2005. године. Како је од сепарације плутонијума из узорака ваздуха прошло десетак година, што је поредиво са релативно кратким периодом полураспада 241Pu, створени су услови да се концентрација 241Pu у ваздуху одреди преко његовог потомка - 241Am. Активност насталог америцијума одређивана је на основу измерене активности 228Th, и прорачунатог доприноса потомака трасера 236Pu помоћу Bateman-ових једначина. Добијени односи 241Pu/239,240Pu налазе се у границама цитираним у литератури. Резултати вишегодишњих мерења објављени су у више публикација у међународним часописима, као и у саопштењима на домаћим и међународним конференцијама. У овом раду је дата свеобухватна анализа поступака за припрему узорака, процедура радиохемијке сепарације изотопа плутонијума из узорака ваздуха, технике припреме алфаспектроскопски танких извора, специфичности поступака анализе снимљених спектара, као и анализа добијених резултата за специфичне активности изотопа 238Pu, 239,240Pu и 241Pu.
AB  - For the purpose of regular monitoring of the concentration of radionuclides in aerosols, air sampling was carried out during the second half of XX century in four places at the Institute „Vinča“ site. Gross beta activities of the aerosols were determined daily. Since beta counting is not destructive method, these samples were subsequently used for the alpha spectrometric measurements. Determination of fallout plutonium, as well as plutonium originated from the Chernobyl accident were performed by alpha spectrometry in the Laboratory for nuclear and plasma physics. Air sampling was performed by pumps with filters. Air samples collected during May 1986 were measured by semiconductor HPGe spectrometer, and the following artificial radionuclides: 137Cs, 134Cs, 106Ru, 125Sb, 144Ce and 110mAg were detected. Maximal concentration of cesium isotopes were observed on 02-03 May, while second maximum was detected on 06 May. Alphaspectrometric measurements of plutonium isotopes indicated also that
maximal concentration of 238Pu and 239,240Pu occurred in the period 01-07 May. Obtained results were in agreement with ones reported in literature for locations of Prague, Munich, and Paris for the same period. Monitoring of air during 1987 and 1989 showed that plutonium isotopes concentrations were below minimal detectable values, except in spring time due to abundant precipitation. The same plutonium sources, prepared during the 90s were re-measured in 2004 and 2005, in order to determine concentration of 241Pu (pure beta emitter) by alpha spectrometry using “Am in-growth Method”. Activity of in-growth americium was determined experimentally, based on measured activity of 228Th, and additionally calculated using the contribution of 236Pu (used as a tracer) descendants obtained by the Bateman’s equations. Obtained activity ratios 241Pu/239,240Pu were within the limits cited in the literature. The result of perennial measurement have been published in several publications in international journals, and presented at numerous national and international conferences. Comprehensive analysis of sample preparation, radiochemical procedure of plutonium separation from air samples, alpha - sources preparation techniques, analysis of recorded spectra, as well as analysis of obtained results for 238Pu, 239,240Pu and 241Pu concentrations are presented in this paper.
PB  - Beograd : Institut za nuklearne nauke "Vinča", Laboratorija za zaštitu od zračenja i zaštitu životne sredine : Društvo za zaštitu od zračenja Srbije i Crne Gore
T2  - Чернобиљ : 30 година после : монографија
T1  - Одређивање изотопа плутонијума у приземним слојевима ваздуха на локацији Винча-Београд у периоду чернобиљског акцидента
T1  - Determination of plutonium isotopes in the surface air at Vinča-Belgrade site following Chernobyl accident
SP  - 72
EP  - 91
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7841
ER  - 

@inbook{
author = "Vukanac, Ivana and Bogojević, Suzana A. and Đurašević, Mirjana M. and Kandić, Aleksandar and Milošević, Zoran",
year = "2016",
abstract = "Током друге половине двадесетог века у циљу редовног праћења концентрације радионуклида у аеросолима, вршена су узорковања ваздуха на четири места на локацији Института за нуклеарне науке „Винча“. У време узорковања одређивана је укупна бета активност дневних узорака аеросола на филтер папиру. Како је бета спектрометрија/бројање недеструктивна метода исти узорци су касније искоришћени за алфаспектрометријска мерења. У узорцима ваздуха из периода интензивних надземних нуклеарних проба, као и из периода непосредно након чернобиљског акцидента, током 90-тих година двадесетог века у Лабораторији за нуклеарну и плазма физику одређивана је концентрација изотопа плутонијума алфаспектрометријском методом. Узорковање ваздуха вршено је помоћу пумпе са филтерима. Две године након Чернобиља узорци ваздуха прикупљани током маја 1986. године, су прво мерени на полупроводничком HPGe спектрометру и
детектовани су следећи вештачки радионуклиди: 137Cs, 134Cs, 106Ru, 125Sb, 144Ce и 110mAg. Максималне концентрације цезијумових изотопа детектоване су у периоду 02-03. маја, док је други максимум детектован 06. маја. Након гамаспектрометријских, урађена су и алфаспектрометријска мерења. Максималне концентрације 238Pu и 239,240Pu детектоване су у периоду 01-07. маја 1986. године, што одговара хронолошки максимално измереним концентрацијама цезијума. Добијени резултати били су у сагласности са доступним резултатима измереним на локацијама Прага, Минхена и Париза за исти временски период. У узорцима сакупљаним током 1987. и 1989. године, концентрације изотопа плутонијума биле су на граници детекције, осим у пролећном периоду када има највише падавина. Непосредно након чернобиљског акцидента, највећи допринос укупној активности плутонијума у околини потицао је од 241Pu, чистог бета емитера. Мерење овог изотопа може се вршити течним сцинтилационим детектором или масеним спектрометром, који нису били доступни у Институту, те овај радионуклид није ни мерен. Међутим, исти електродепоновани алфа извори плутонијума, припремани почетком деведесетих година прошлог века, поново су мерени алфаспектрометријски током 2004. и 2005. године. Како је од сепарације плутонијума из узорака ваздуха прошло десетак година, што је поредиво са релативно кратким периодом полураспада 241Pu, створени су услови да се концентрација 241Pu у ваздуху одреди преко његовог потомка - 241Am. Активност насталог америцијума одређивана је на основу измерене активности 228Th, и прорачунатог доприноса потомака трасера 236Pu помоћу Bateman-ових једначина. Добијени односи 241Pu/239,240Pu налазе се у границама цитираним у литератури. Резултати вишегодишњих мерења објављени су у више публикација у међународним часописима, као и у саопштењима на домаћим и међународним конференцијама. У овом раду је дата свеобухватна анализа поступака за припрему узорака, процедура радиохемијке сепарације изотопа плутонијума из узорака ваздуха, технике припреме алфаспектроскопски танких извора, специфичности поступака анализе снимљених спектара, као и анализа добијених резултата за специфичне активности изотопа 238Pu, 239,240Pu и 241Pu., For the purpose of regular monitoring of the concentration of radionuclides in aerosols, air sampling was carried out during the second half of XX century in four places at the Institute „Vinča“ site. Gross beta activities of the aerosols were determined daily. Since beta counting is not destructive method, these samples were subsequently used for the alpha spectrometric measurements. Determination of fallout plutonium, as well as plutonium originated from the Chernobyl accident were performed by alpha spectrometry in the Laboratory for nuclear and plasma physics. Air sampling was performed by pumps with filters. Air samples collected during May 1986 were measured by semiconductor HPGe spectrometer, and the following artificial radionuclides: 137Cs, 134Cs, 106Ru, 125Sb, 144Ce and 110mAg were detected. Maximal concentration of cesium isotopes were observed on 02-03 May, while second maximum was detected on 06 May. Alphaspectrometric measurements of plutonium isotopes indicated also that
maximal concentration of 238Pu and 239,240Pu occurred in the period 01-07 May. Obtained results were in agreement with ones reported in literature for locations of Prague, Munich, and Paris for the same period. Monitoring of air during 1987 and 1989 showed that plutonium isotopes concentrations were below minimal detectable values, except in spring time due to abundant precipitation. The same plutonium sources, prepared during the 90s were re-measured in 2004 and 2005, in order to determine concentration of 241Pu (pure beta emitter) by alpha spectrometry using “Am in-growth Method”. Activity of in-growth americium was determined experimentally, based on measured activity of 228Th, and additionally calculated using the contribution of 236Pu (used as a tracer) descendants obtained by the Bateman’s equations. Obtained activity ratios 241Pu/239,240Pu were within the limits cited in the literature. The result of perennial measurement have been published in several publications in international journals, and presented at numerous national and international conferences. Comprehensive analysis of sample preparation, radiochemical procedure of plutonium separation from air samples, alpha - sources preparation techniques, analysis of recorded spectra, as well as analysis of obtained results for 238Pu, 239,240Pu and 241Pu concentrations are presented in this paper.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča", Laboratorija za zaštitu od zračenja i zaštitu životne sredine : Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "Чернобиљ : 30 година после : монографија",
booktitle = "Одређивање изотопа плутонијума у приземним слојевима ваздуха на локацији Винча-Београд у периоду чернобиљског акцидента, Determination of plutonium isotopes in the surface air at Vinča-Belgrade site following Chernobyl accident",
pages = "72-91",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7841"
}

Vukanac, I., Bogojević, S. A., Đurašević, M. M., Kandić, A.,& Milošević, Z.. (2016). Одређивање изотопа плутонијума у приземним слојевима ваздуха на локацији Винча-Београд у периоду чернобиљског акцидента. in Чернобиљ : 30 година после : монографија
Beograd : Institut za nuklearne nauke "Vinča", Laboratorija za zaštitu od zračenja i zaštitu životne sredine : Društvo za zaštitu od zračenja Srbije i Crne Gore., 72-91.
https://hdl.handle.net/21.15107/rcub_vinar_7841

Vukanac I, Bogojević SA, Đurašević MM, Kandić A, Milošević Z. Одређивање изотопа плутонијума у приземним слојевима ваздуха на локацији Винча-Београд у периоду чернобиљског акцидента. in Чернобиљ : 30 година после : монографија. 2016;:72-91.
https://hdl.handle.net/21.15107/rcub_vinar_7841 .

Vukanac, Ivana, Bogojević, Suzana A., Đurašević, Mirjana M., Kandić, Aleksandar, Milošević, Zoran, "Одређивање изотопа плутонијума у приземним слојевима ваздуха на локацији Винча-Београд у периоду чернобиљског акцидента" in Чернобиљ : 30 година после : монографија (2016):72-91,
https://hdl.handle.net/21.15107/rcub_vinar_7841 .

TY  - JOUR
AU  - Novković, Dušan N.
AU  - Đurašević, Mirjana M.
AU  - Kandić, Aleksandar
AU  - Vukanac, Ivana
AU  - Šešlak, Bojan Ž.
AU  - Milošević, Zoran
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/876
AB  - In this article, the X-ray and gamma-ray coincidence summing effect in Eu-152 is studied. Coincidence summing corrections and peak and total efficiencies of point and volume sources were determined using the direct matrices multiplication (DMM) method. The theoretically evaluated peak count rates were found to be in good agreement with the experimentally obtained values. Validation was performed by comparing the calculated efficiency curves and the corresponding correction factors with the results obtained using GESPECOR 4.2 software. (C) 2015 Elsevier Ltd. All rights reserved.
T2  - Applied Radiation and Isotopes
T1  - Coincidence summing corrections for point and volume Eu-152 sources
VL  - 107
SP  - 138
EP  - 144
DO  - 10.1016/j.apradiso.2015.10.015
ER  - 

@article{
author = "Novković, Dušan N. and Đurašević, Mirjana M. and Kandić, Aleksandar and Vukanac, Ivana and Šešlak, Bojan Ž. and Milošević, Zoran",
year = "2016",
abstract = "In this article, the X-ray and gamma-ray coincidence summing effect in Eu-152 is studied. Coincidence summing corrections and peak and total efficiencies of point and volume sources were determined using the direct matrices multiplication (DMM) method. The theoretically evaluated peak count rates were found to be in good agreement with the experimentally obtained values. Validation was performed by comparing the calculated efficiency curves and the corresponding correction factors with the results obtained using GESPECOR 4.2 software. (C) 2015 Elsevier Ltd. All rights reserved.",
journal = "Applied Radiation and Isotopes",
title = "Coincidence summing corrections for point and volume Eu-152 sources",
volume = "107",
pages = "138-144",
doi = "10.1016/j.apradiso.2015.10.015"
}

Novković, D. N., Đurašević, M. M., Kandić, A., Vukanac, I., Šešlak, B. Ž.,& Milošević, Z.. (2016). Coincidence summing corrections for point and volume Eu-152 sources. in Applied Radiation and Isotopes, 107, 138-144.
https://doi.org/10.1016/j.apradiso.2015.10.015

Novković DN, Đurašević MM, Kandić A, Vukanac I, Šešlak BŽ, Milošević Z. Coincidence summing corrections for point and volume Eu-152 sources. in Applied Radiation and Isotopes. 2016;107:138-144.
doi:10.1016/j.apradiso.2015.10.015 .

Novković, Dušan N., Đurašević, Mirjana M., Kandić, Aleksandar, Vukanac, Ivana, Šešlak, Bojan Ž., Milošević, Zoran, "Coincidence summing corrections for point and volume Eu-152 sources" in Applied Radiation and Isotopes, 107 (2016):138-144,
https://doi.org/10.1016/j.apradiso.2015.10.015 . .

TY  - CONF
AU  - Kandić, Aleksandar
AU  - Šešlak, Bojan
AU  - Đurašević, Mirjana
AU  - Erić, Milić
AU  - Vukanac, Ivana
AU  - Marković, Zoran J.
AU  - Milošević, Zoran
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12819
AB  - Ugalj, šljaka i pepeo iz termoelektrana sadrţe prirodne radionuklide čije se specifične aktivnosti mogu odrediti pomoću poluprovodničke gama spektrometrijske analize. Ove specifične aktivnosti su uglavnom niske, pa se stoga uzorci mere na malim rastojanjima od detektora, gde su izraţeni efekti koincidentnog sumiranja. U radu su prikazani korekcioni faktori za sumacione efekte za radionuklide iz uranovog (234mPa, 234Th, 226Ra, 214Bi i 214Pb) i torijumovog niza (228Ac, 224Ra, 212Pb, 212Bi i 208Tl) dobijeni primenom softvera EFFTRAN, kao i korigovane vrednosti specifičnih aktivnosti.
AB  - Coal, slag and ash from thermal power plants contain natural radionuclides whose specific activity could be determined by semiconductor gamma spectrometry. These specific activities are generally low, and therefore the samples should be measured at small distances from the detector, where coincidence summing effect are very pronounced. The corrections factors, obtained by using software EFFTRAN, for coincidence summing effects in the case of radionuclides from uranium ( 234mPa, 234Th, 226Ra, 214Bi and 214Pb) and thorium (228Ac, 224Ra, 212Pb, 212Bi and 208Tl) serie are presented in this paper, as well as corrected values for specific activities.
PB  - Beograd : Univerzitet u Beogradu, Institut za nuklearne nauke "Vinča"
PB  - Beograd : Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 28. симпозијум ДЗЗСЦГ : зборник радова
T1  - Primena softvera Efftran u analizi specifiĉnih aktivnosti uzoraka uglja, šljake i pepela iz termoelektrana
T1  - Application of software Efftran in radiological analysis of coal, slag and ash samples from thermal power plants
SP  - 464
EP  - 469
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12819
ER  - 

@conference{
author = "Kandić, Aleksandar and Šešlak, Bojan and Đurašević, Mirjana and Erić, Milić and Vukanac, Ivana and Marković, Zoran J. and Milošević, Zoran",
year = "2015",
abstract = "Ugalj, šljaka i pepeo iz termoelektrana sadrţe prirodne radionuklide čije se specifične aktivnosti mogu odrediti pomoću poluprovodničke gama spektrometrijske analize. Ove specifične aktivnosti su uglavnom niske, pa se stoga uzorci mere na malim rastojanjima od detektora, gde su izraţeni efekti koincidentnog sumiranja. U radu su prikazani korekcioni faktori za sumacione efekte za radionuklide iz uranovog (234mPa, 234Th, 226Ra, 214Bi i 214Pb) i torijumovog niza (228Ac, 224Ra, 212Pb, 212Bi i 208Tl) dobijeni primenom softvera EFFTRAN, kao i korigovane vrednosti specifičnih aktivnosti., Coal, slag and ash from thermal power plants contain natural radionuclides whose specific activity could be determined by semiconductor gamma spectrometry. These specific activities are generally low, and therefore the samples should be measured at small distances from the detector, where coincidence summing effect are very pronounced. The corrections factors, obtained by using software EFFTRAN, for coincidence summing effects in the case of radionuclides from uranium ( 234mPa, 234Th, 226Ra, 214Bi and 214Pb) and thorium (228Ac, 224Ra, 212Pb, 212Bi and 208Tl) serie are presented in this paper, as well as corrected values for specific activities.",
publisher = "Beograd : Univerzitet u Beogradu, Institut za nuklearne nauke "Vinča", Beograd : Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "28. симпозијум ДЗЗСЦГ : зборник радова",
title = "Primena softvera Efftran u analizi specifiĉnih aktivnosti uzoraka uglja, šljake i pepela iz termoelektrana, Application of software Efftran in radiological analysis of coal, slag and ash samples from thermal power plants",
pages = "464-469",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12819"
}

Kandić, A., Šešlak, B., Đurašević, M., Erić, M., Vukanac, I., Marković, Z. J.,& Milošević, Z.. (2015). Primena softvera Efftran u analizi specifiĉnih aktivnosti uzoraka uglja, šljake i pepela iz termoelektrana. in 28. симпозијум ДЗЗСЦГ : зборник радова
Beograd : Univerzitet u Beogradu, Institut za nuklearne nauke "Vinča"., 464-469.
https://hdl.handle.net/21.15107/rcub_vinar_12819

Kandić A, Šešlak B, Đurašević M, Erić M, Vukanac I, Marković ZJ, Milošević Z. Primena softvera Efftran u analizi specifiĉnih aktivnosti uzoraka uglja, šljake i pepela iz termoelektrana. in 28. симпозијум ДЗЗСЦГ : зборник радова. 2015;:464-469.
https://hdl.handle.net/21.15107/rcub_vinar_12819 .

Kandić, Aleksandar, Šešlak, Bojan, Đurašević, Mirjana, Erić, Milić, Vukanac, Ivana, Marković, Zoran J., Milošević, Zoran, "Primena softvera Efftran u analizi specifiĉnih aktivnosti uzoraka uglja, šljake i pepela iz termoelektrana" in 28. симпозијум ДЗЗСЦГ : зборник радова (2015):464-469,
https://hdl.handle.net/21.15107/rcub_vinar_12819 .

TY  - CONF
AU  - Kandić, Aleksandar
AU  - Šešlak, Bojan
AU  - Đurašević, Mirjana
AU  - Erić, Milić
AU  - Vukanac, Ivana
AU  - Milošević, Zoran
AU  - Marković, Zoran
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12759
AB  - Ugalj,iporedsve intenzivnijeg razvoja i korišćenja obnovljivih izvora energije, ima i dalje značajnu ulogu u proizvodnji električne energije širom sveta. U Republici Srbiji prema godišnjem izveštaju “Elektroprivrede Srbije” za 2013. godinu u termoelektranama, čije jepogonsko gorivo lignit, proizvedeno je 26 537GWhod ukupno37 433 GWh električne energije[1]. Proizvodnja uglja, koji se koristi u termoelektranama “Elektroprivrede Srbije”, odvija se na površinskim kopovima rudarskih basena Kolubara (75 %) iKostolac(25 %) [2].
AB  - Coal as the fossil fuel contains naturally occurring radionuclides and belongs toNORM (Naturally Occurring Radioactive Materials). On the other hand, slag and fly-ash belong to TENORM (Technically Enhanced Naturally Occurring Radioactive Material), and if they are released into the environment an increase and/or redistribution of natural radionuclide content can occur. For the purposes of this study, six sets of samples (18 in total) of “Kolubara” coal, slag and fly-ash were collected during the periodical emission tests in May 2012th at steam boilers K3 and K4 of TPP “Kolubara”, Serbia. Coal, slag and fly-ash samples were prepared for analysis (milled, dried, sieved and weighed) by appropriate standard methods. Prepared samples were placedin 125 mL PVC cylindrical boxes, weighted and sealed with natural wax. Sealed samples were measured with a semiconductor HPGe spectrometer (37 % relative efficiency) after the radioactive equilibrium was reached. The obtained values of specific activity for coal (Ac), slag (As) and fly-ash (Af) do not differ significantly compared to the values available in the literature. Analysis of determined mutual ratiosAs/Ac andAf/Ac are consistent, taking into account uncertainties ofactivity concentrations, with values of approximately 2 and 4, forK3, and1.5 and 4, forK4. Discrepancies were notedonly for40K (bothsteam boilers) ofAs/Ac.Results indicate that further investigation with more samples should be undertaken, and also correlation between radiological and proximate analysis should be determined.
PB  - Zagreb : Croatian Radiation Protection Association
C3  - CRPA : 10th Symposium of the Croatian Radiation Protection Association : Proceedings
T1  - Određivanje međusobnih odnosa specifičnih aktivnosti uzoraka uglja, pepela i šljake iz termoelektrane “Kolubara”, Srbija
T1  - Determination of mutual ratios for specific activity in coal, slag and fly-ash samples from “Kolubara” power plant
SP  - 286
EP  - 291
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12759
ER  - 

@conference{
author = "Kandić, Aleksandar and Šešlak, Bojan and Đurašević, Mirjana and Erić, Milić and Vukanac, Ivana and Milošević, Zoran and Marković, Zoran",
year = "2015",
abstract = "Ugalj,iporedsve intenzivnijeg razvoja i korišćenja obnovljivih izvora energije, ima i dalje značajnu ulogu u proizvodnji električne energije širom sveta. U Republici Srbiji prema godišnjem izveštaju “Elektroprivrede Srbije” za 2013. godinu u termoelektranama, čije jepogonsko gorivo lignit, proizvedeno je 26 537GWhod ukupno37 433 GWh električne energije[1]. Proizvodnja uglja, koji se koristi u termoelektranama “Elektroprivrede Srbije”, odvija se na površinskim kopovima rudarskih basena Kolubara (75 %) iKostolac(25 %) [2]., Coal as the fossil fuel contains naturally occurring radionuclides and belongs toNORM (Naturally Occurring Radioactive Materials). On the other hand, slag and fly-ash belong to TENORM (Technically Enhanced Naturally Occurring Radioactive Material), and if they are released into the environment an increase and/or redistribution of natural radionuclide content can occur. For the purposes of this study, six sets of samples (18 in total) of “Kolubara” coal, slag and fly-ash were collected during the periodical emission tests in May 2012th at steam boilers K3 and K4 of TPP “Kolubara”, Serbia. Coal, slag and fly-ash samples were prepared for analysis (milled, dried, sieved and weighed) by appropriate standard methods. Prepared samples were placedin 125 mL PVC cylindrical boxes, weighted and sealed with natural wax. Sealed samples were measured with a semiconductor HPGe spectrometer (37 % relative efficiency) after the radioactive equilibrium was reached. The obtained values of specific activity for coal (Ac), slag (As) and fly-ash (Af) do not differ significantly compared to the values available in the literature. Analysis of determined mutual ratiosAs/Ac andAf/Ac are consistent, taking into account uncertainties ofactivity concentrations, with values of approximately 2 and 4, forK3, and1.5 and 4, forK4. Discrepancies were notedonly for40K (bothsteam boilers) ofAs/Ac.Results indicate that further investigation with more samples should be undertaken, and also correlation between radiological and proximate analysis should be determined.",
publisher = "Zagreb : Croatian Radiation Protection Association",
journal = "CRPA : 10th Symposium of the Croatian Radiation Protection Association : Proceedings",
title = "Određivanje međusobnih odnosa specifičnih aktivnosti uzoraka uglja, pepela i šljake iz termoelektrane “Kolubara”, Srbija, Determination of mutual ratios for specific activity in coal, slag and fly-ash samples from “Kolubara” power plant",
pages = "286-291",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12759"
}

Kandić, A., Šešlak, B., Đurašević, M., Erić, M., Vukanac, I., Milošević, Z.,& Marković, Z.. (2015). Određivanje međusobnih odnosa specifičnih aktivnosti uzoraka uglja, pepela i šljake iz termoelektrane “Kolubara”, Srbija. in CRPA : 10th Symposium of the Croatian Radiation Protection Association : Proceedings
Zagreb : Croatian Radiation Protection Association., 286-291.
https://hdl.handle.net/21.15107/rcub_vinar_12759

Kandić A, Šešlak B, Đurašević M, Erić M, Vukanac I, Milošević Z, Marković Z. Određivanje međusobnih odnosa specifičnih aktivnosti uzoraka uglja, pepela i šljake iz termoelektrane “Kolubara”, Srbija. in CRPA : 10th Symposium of the Croatian Radiation Protection Association : Proceedings. 2015;:286-291.
https://hdl.handle.net/21.15107/rcub_vinar_12759 .

Kandić, Aleksandar, Šešlak, Bojan, Đurašević, Mirjana, Erić, Milić, Vukanac, Ivana, Milošević, Zoran, Marković, Zoran, "Određivanje međusobnih odnosa specifičnih aktivnosti uzoraka uglja, pepela i šljake iz termoelektrane “Kolubara”, Srbija" in CRPA : 10th Symposium of the Croatian Radiation Protection Association : Proceedings (2015):286-291,
https://hdl.handle.net/21.15107/rcub_vinar_12759 .

TY  - CONF
AU  - Šešlak, Bojan
AU  - Đurašević, Mirjana
AU  - Erić, Milić
AU  - Kandić, Aleksandar
AU  - Vukanac, Ivana
AU  - Marković, Zoran
AU  - Milošević, Zoran
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12817
PB  - Niš : University of Niš, Faculty of Mechanical Engineering in Niš
C3  - SIMTERM : 17th Symposium on Thermal Science and Engineering of Serbia : “Energy – Ecology – Efficiency” : Proceedigns
T1  - Natural Radioactivity in Coal, Slag, and Fly-ash Samples from “Nikola Tesla” Power Plant – Risk Assessment
SP  - 542
EP  - 548
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12817
ER  - 

@conference{
author = "Šešlak, Bojan and Đurašević, Mirjana and Erić, Milić and Kandić, Aleksandar and Vukanac, Ivana and Marković, Zoran and Milošević, Zoran",
year = "2015",
publisher = "Niš : University of Niš, Faculty of Mechanical Engineering in Niš",
journal = "SIMTERM : 17th Symposium on Thermal Science and Engineering of Serbia : “Energy – Ecology – Efficiency” : Proceedigns",
title = "Natural Radioactivity in Coal, Slag, and Fly-ash Samples from “Nikola Tesla” Power Plant – Risk Assessment",
pages = "542-548",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12817"
}

Šešlak, B., Đurašević, M., Erić, M., Kandić, A., Vukanac, I., Marković, Z.,& Milošević, Z.. (2015). Natural Radioactivity in Coal, Slag, and Fly-ash Samples from “Nikola Tesla” Power Plant – Risk Assessment. in SIMTERM : 17th Symposium on Thermal Science and Engineering of Serbia : “Energy – Ecology – Efficiency” : Proceedigns
Niš : University of Niš, Faculty of Mechanical Engineering in Niš., 542-548.
https://hdl.handle.net/21.15107/rcub_vinar_12817

Šešlak B, Đurašević M, Erić M, Kandić A, Vukanac I, Marković Z, Milošević Z. Natural Radioactivity in Coal, Slag, and Fly-ash Samples from “Nikola Tesla” Power Plant – Risk Assessment. in SIMTERM : 17th Symposium on Thermal Science and Engineering of Serbia : “Energy – Ecology – Efficiency” : Proceedigns. 2015;:542-548.
https://hdl.handle.net/21.15107/rcub_vinar_12817 .

Šešlak, Bojan, Đurašević, Mirjana, Erić, Milić, Kandić, Aleksandar, Vukanac, Ivana, Marković, Zoran, Milošević, Zoran, "Natural Radioactivity in Coal, Slag, and Fly-ash Samples from “Nikola Tesla” Power Plant – Risk Assessment" in SIMTERM : 17th Symposium on Thermal Science and Engineering of Serbia : “Energy – Ecology – Efficiency” : Proceedigns (2015):542-548,
https://hdl.handle.net/21.15107/rcub_vinar_12817 .

TY  - CONF
AU  - Lončar, Boris
AU  - Đurašević, Mirjana M.
AU  - Kandić, Aleksandar
AU  - Vukanac, Ivana
AU  - Šešlak, Bojan
AU  - Milošević, Zoran
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12830
AB  - The Direct Matrices Multiplication (DMM) method was developed by D. Novkovi as theoretical model for coincidence summing of X-and gamma rays of radionuclides with complex decays schemes. This method enables: a) identification of allpossible decay paths and decay paths outcomes; b)calculation of particular path outcome, probabilities and corresponding energy deposited in the detector; c) determination of theoretical expressions for count rates of single and summing peaks as well as for total count rate, where the unknown quantities are the total and peak detection efficiencies. This method can be applied to the point sources and for small source-to-detector distances. lt was successfully applied to the decay of 13e6", 576o, '338., and 75Se. The DMM method was tested on the equivalence with other methods for calculation of coincidence summing corrections by G. Kanisch, T. Vidmar and O. Sima and a good agreement with the GESPRECOR program was confirmed for point sources of 133Ba, 13aCs and, 152Er. ln the case of the volume sources, calculations of coincidence summing corrections, peak and total efficiencies are more complex than for point sources. Laboratory for Nuclear and Plasma Physics participated in the intercomparison, organized by the Gamma-ray Spectrometry working group of the lnternational Committee for Radionuclide Metrology (ICRM). Volume iorr.", filled by radioactive solution ("'Er, 134Cs) and with different absorbers have been considered. Results obtained by DMM method showed satisfactory agreement with the mean values.
C3  - 3rd European Nuclear Physics Conference (EuNPC2015) : Book of abstracts
T1  - Application of the Direct Matrices Multiplication method in gamma ray spectrometry
SP  - 120
EP  - 120
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12830
ER  - 

@conference{
author = "Lončar, Boris and Đurašević, Mirjana M. and Kandić, Aleksandar and Vukanac, Ivana and Šešlak, Bojan and Milošević, Zoran",
year = "2015",
abstract = "The Direct Matrices Multiplication (DMM) method was developed by D. Novkovi as theoretical model for coincidence summing of X-and gamma rays of radionuclides with complex decays schemes. This method enables: a) identification of allpossible decay paths and decay paths outcomes; b)calculation of particular path outcome, probabilities and corresponding energy deposited in the detector; c) determination of theoretical expressions for count rates of single and summing peaks as well as for total count rate, where the unknown quantities are the total and peak detection efficiencies. This method can be applied to the point sources and for small source-to-detector distances. lt was successfully applied to the decay of 13e6", 576o, '338., and 75Se. The DMM method was tested on the equivalence with other methods for calculation of coincidence summing corrections by G. Kanisch, T. Vidmar and O. Sima and a good agreement with the GESPRECOR program was confirmed for point sources of 133Ba, 13aCs and, 152Er. ln the case of the volume sources, calculations of coincidence summing corrections, peak and total efficiencies are more complex than for point sources. Laboratory for Nuclear and Plasma Physics participated in the intercomparison, organized by the Gamma-ray Spectrometry working group of the lnternational Committee for Radionuclide Metrology (ICRM). Volume iorr.", filled by radioactive solution ("'Er, 134Cs) and with different absorbers have been considered. Results obtained by DMM method showed satisfactory agreement with the mean values.",
journal = "3rd European Nuclear Physics Conference (EuNPC2015) : Book of abstracts",
title = "Application of the Direct Matrices Multiplication method in gamma ray spectrometry",
pages = "120-120",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12830"
}

Lončar, B., Đurašević, M. M., Kandić, A., Vukanac, I., Šešlak, B.,& Milošević, Z.. (2015). Application of the Direct Matrices Multiplication method in gamma ray spectrometry. in 3rd European Nuclear Physics Conference (EuNPC2015) : Book of abstracts, 120-120.
https://hdl.handle.net/21.15107/rcub_vinar_12830

Lončar B, Đurašević MM, Kandić A, Vukanac I, Šešlak B, Milošević Z. Application of the Direct Matrices Multiplication method in gamma ray spectrometry. in 3rd European Nuclear Physics Conference (EuNPC2015) : Book of abstracts. 2015;:120-120.
https://hdl.handle.net/21.15107/rcub_vinar_12830 .

Lončar, Boris, Đurašević, Mirjana M., Kandić, Aleksandar, Vukanac, Ivana, Šešlak, Bojan, Milošević, Zoran, "Application of the Direct Matrices Multiplication method in gamma ray spectrometry" in 3rd European Nuclear Physics Conference (EuNPC2015) : Book of abstracts (2015):120-120,
https://hdl.handle.net/21.15107/rcub_vinar_12830 .

TY  - CONF
AU  - Šešlak, Bojan
AU  - Ujić, Predrag
AU  - Vukanac, Ivana
AU  - Kandić, Aleksandar
AU  - Đurašević, Mirjana
AU  - Čeliković, Igor
AU  - Milošević, Zoran
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12833
PB  - Veszprém, Hungary : Hungarian Biophysical Society
C3  - TREICEP : IV. Terrestrial Radionuclides in Environment International Conference on Environmental Protection : Book of abstracts
T1  - The content of 137Cs and 40K in wood ash
SP  - 4
EP  - 4
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12833
ER  - 

@conference{
author = "Šešlak, Bojan and Ujić, Predrag and Vukanac, Ivana and Kandić, Aleksandar and Đurašević, Mirjana and Čeliković, Igor and Milošević, Zoran",
year = "2014",
publisher = "Veszprém, Hungary : Hungarian Biophysical Society",
journal = "TREICEP : IV. Terrestrial Radionuclides in Environment International Conference on Environmental Protection : Book of abstracts",
title = "The content of 137Cs and 40K in wood ash",
pages = "4-4",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12833"
}

Šešlak, B., Ujić, P., Vukanac, I., Kandić, A., Đurašević, M., Čeliković, I.,& Milošević, Z.. (2014). The content of 137Cs and 40K in wood ash. in TREICEP : IV. Terrestrial Radionuclides in Environment International Conference on Environmental Protection : Book of abstracts
Veszprém, Hungary : Hungarian Biophysical Society., 4-4.
https://hdl.handle.net/21.15107/rcub_vinar_12833

Šešlak B, Ujić P, Vukanac I, Kandić A, Đurašević M, Čeliković I, Milošević Z. The content of 137Cs and 40K in wood ash. in TREICEP : IV. Terrestrial Radionuclides in Environment International Conference on Environmental Protection : Book of abstracts. 2014;:4-4.
https://hdl.handle.net/21.15107/rcub_vinar_12833 .

Šešlak, Bojan, Ujić, Predrag, Vukanac, Ivana, Kandić, Aleksandar, Đurašević, Mirjana, Čeliković, Igor, Milošević, Zoran, "The content of 137Cs and 40K in wood ash" in TREICEP : IV. Terrestrial Radionuclides in Environment International Conference on Environmental Protection : Book of abstracts (2014):4-4,
https://hdl.handle.net/21.15107/rcub_vinar_12833 .

TY  - JOUR
AU  - Đurašević, Mirjana M.
AU  - Kandić, Aleksandar
AU  - Stefanović, Predrag Lj.
AU  - Vukanac, Ivana
AU  - Šešlak, Bojan Ž.
AU  - Milošević, Zoran
AU  - Markovic, T.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5975
AB  - Coal as fossil fuel mainly contains naturally occurring radionuclides from the uranium and thorium series and K-40. Use of coal, primarily in industry, as a result has dispersion of radioactive material from coal in and through air and water. The aim of this study was to determine the activity concentrations of natural radionuclides in coal samples from open pit mines Kolubara and to evaluate its effect on population health. The results showed that all measured and calculated values were below the limits recommended in international legislation. (c) 2013 Elsevier Ltd. All rights reserved.
T2  - Applied Radiation and Isotopes
T1  - Natural radioactivity in lignite samples from open pit mines Kolubara, Serbia - risk assessment
VL  - 87
IS  - SI
SP  - 73
EP  - 76
DO  - 10.1016/j.apradiso.2013.11.096
ER  - 

@article{
author = "Đurašević, Mirjana M. and Kandić, Aleksandar and Stefanović, Predrag Lj. and Vukanac, Ivana and Šešlak, Bojan Ž. and Milošević, Zoran and Markovic, T.",
year = "2014",
abstract = "Coal as fossil fuel mainly contains naturally occurring radionuclides from the uranium and thorium series and K-40. Use of coal, primarily in industry, as a result has dispersion of radioactive material from coal in and through air and water. The aim of this study was to determine the activity concentrations of natural radionuclides in coal samples from open pit mines Kolubara and to evaluate its effect on population health. The results showed that all measured and calculated values were below the limits recommended in international legislation. (c) 2013 Elsevier Ltd. All rights reserved.",
journal = "Applied Radiation and Isotopes",
title = "Natural radioactivity in lignite samples from open pit mines Kolubara, Serbia - risk assessment",
volume = "87",
number = "SI",
pages = "73-76",
doi = "10.1016/j.apradiso.2013.11.096"
}

Đurašević, M. M., Kandić, A., Stefanović, P. Lj., Vukanac, I., Šešlak, B. Ž., Milošević, Z.,& Markovic, T.. (2014). Natural radioactivity in lignite samples from open pit mines Kolubara, Serbia - risk assessment. in Applied Radiation and Isotopes, 87(SI), 73-76.
https://doi.org/10.1016/j.apradiso.2013.11.096

Đurašević MM, Kandić A, Stefanović PL, Vukanac I, Šešlak BŽ, Milošević Z, Markovic T. Natural radioactivity in lignite samples from open pit mines Kolubara, Serbia - risk assessment. in Applied Radiation and Isotopes. 2014;87(SI):73-76.
doi:10.1016/j.apradiso.2013.11.096 .

Đurašević, Mirjana M., Kandić, Aleksandar, Stefanović, Predrag Lj., Vukanac, Ivana, Šešlak, Bojan Ž., Milošević, Zoran, Markovic, T., "Natural radioactivity in lignite samples from open pit mines Kolubara, Serbia - risk assessment" in Applied Radiation and Isotopes, 87, no. SI (2014):73-76,
https://doi.org/10.1016/j.apradiso.2013.11.096 . .

TY  - CONF
AU  - Đurašević, Mirjana
AU  - Kandić, Aleksandar
AU  - Vukanac, Ivana
AU  - Šešlak, Bojan
AU  - Milošević, Zoran
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12821
AB  - Učešćem u interkomparaciji organizovanoj od strane Gamaspektrometrijske radne grupe u okviru ICRM, već razvijeni teorijski model za potrebe rešavanja problema koincidentnog sumiranja primenjen je na zapreminske izvore. Analizirana je vrlo složena šema 152Eu i formiran sistem jednačina. Rešavanje tako formiranog sistema zahtevalo je uvođenje određenih aproksimacija. U radu su prikazani izračunati korekcioni faktori za geometriju cilindrične PVC kutijice i radionuklid 152Eu u kombinaciji sa bakrom i pleksiglasom kao apsorberom.
AB  - A theoretical model for solving the problem of coincidence summing based on matrix formalism was applied to the volume sources in the intercomparison exercise, organized by the Gamma-spectrometric working group within the International Committee for Radionuclide Metrology. A complex decay scheme of 152Eu was analyzed and the system of equations was formed. Solving this system required the introduction of some approximations. The calculated correction factors for a cylindrical geometry box and radionuclide 152Eu in combination with copper and plexiglas as absorber are presented in this paper.
PB  - Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 27. simpozijum DZZSCG : zbornik radova
T1  - Izračunavanje korekcionih faktora za koincidentno sumiranje za 152Eu-zapreminski izvori
T1  - Calculation of coincidence summing correction factors for 152Eu-volume sources
SP  - 427
EP  - 430
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12821
ER  - 

@conference{
author = "Đurašević, Mirjana and Kandić, Aleksandar and Vukanac, Ivana and Šešlak, Bojan and Milošević, Zoran",
year = "2013",
abstract = "Učešćem u interkomparaciji organizovanoj od strane Gamaspektrometrijske radne grupe u okviru ICRM, već razvijeni teorijski model za potrebe rešavanja problema koincidentnog sumiranja primenjen je na zapreminske izvore. Analizirana je vrlo složena šema 152Eu i formiran sistem jednačina. Rešavanje tako formiranog sistema zahtevalo je uvođenje određenih aproksimacija. U radu su prikazani izračunati korekcioni faktori za geometriju cilindrične PVC kutijice i radionuklid 152Eu u kombinaciji sa bakrom i pleksiglasom kao apsorberom., A theoretical model for solving the problem of coincidence summing based on matrix formalism was applied to the volume sources in the intercomparison exercise, organized by the Gamma-spectrometric working group within the International Committee for Radionuclide Metrology. A complex decay scheme of 152Eu was analyzed and the system of equations was formed. Solving this system required the introduction of some approximations. The calculated correction factors for a cylindrical geometry box and radionuclide 152Eu in combination with copper and plexiglas as absorber are presented in this paper.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "27. simpozijum DZZSCG : zbornik radova",
title = "Izračunavanje korekcionih faktora za koincidentno sumiranje za 152Eu-zapreminski izvori, Calculation of coincidence summing correction factors for 152Eu-volume sources",
pages = "427-430",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12821"
}

Đurašević, M., Kandić, A., Vukanac, I., Šešlak, B.,& Milošević, Z.. (2013). Izračunavanje korekcionih faktora za koincidentno sumiranje za 152Eu-zapreminski izvori. in 27. simpozijum DZZSCG : zbornik radova
Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore., 427-430.
https://hdl.handle.net/21.15107/rcub_vinar_12821

Đurašević M, Kandić A, Vukanac I, Šešlak B, Milošević Z. Izračunavanje korekcionih faktora za koincidentno sumiranje za 152Eu-zapreminski izvori. in 27. simpozijum DZZSCG : zbornik radova. 2013;:427-430.
https://hdl.handle.net/21.15107/rcub_vinar_12821 .

Đurašević, Mirjana, Kandić, Aleksandar, Vukanac, Ivana, Šešlak, Bojan, Milošević, Zoran, "Izračunavanje korekcionih faktora za koincidentno sumiranje za 152Eu-zapreminski izvori" in 27. simpozijum DZZSCG : zbornik radova (2013):427-430,
https://hdl.handle.net/21.15107/rcub_vinar_12821 .

TY  - CONF
AU  - Vukanac, Ivana
AU  - Đurašević, Mirjana
AU  - Šešlak, Bojan
AU  - Kandić, Aleksandar
AU  - Milošević, Zoran
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12845
AB  - Laboratorija za nuklearnu i plazma fiziku Instituta „Vinča“, Laboratoriji za metrologiju radionuklida (LMR), ovlašćena je i akreditovana za gamaspektrometrijska ispitivanja sadržaja radionuklida u uzorcima različitog porekla. Da bi se obezbedila tačnost i pouzdanost rezultata merenja, a po zahtevima standarda ISO 17025, vrše se periodična interna etaloniranja HPGe poluprovodničkih spektrometara. Zbog raznovrsnosti uzoraka koji se mere kalibracija se mora izvršiti za više različitih geometrija i matriksa. U većini Laboratorija za ispitivanje radioaktivnosti, zbog specifičnosti ispitivanih uzoraka i geometrija merenja, nedostatka materijalnih sredstava i sl., uglavnom postoji problem adekvatnosti i mogućnosti nabavke komercijalno dostupnih radioaktivnih standarda i referentnih materijala. Program internog etaloniranja se u LMR sprovodi pomoću radnih standarda napravljenih u skladu sa potrebama i iskustvima proizišlim iz dugogodišnje prakse, a pouzdanost merenja proverena je uspešnim učešćem na više međunarodnih interkomparacija i PT šema. Zbog konačnog veka trajanja radioaktivnih standarda, određenog vremenima poluraspada radionuklida prisutnih u standardu, u LMR su u više navrata pripremani setovi radnih standarda pomoću standardnog rastvora miksa radionuklida gama emitera [1], a po proceduri detaljno opisanoj u literaturi [2,3]. U radu će sumarno biti prezentovana iskustva stečena tokom primene procedura pripreme radnih standarda.
AB  - In the Laboratory for Radionuclide Metrology at Vinča Institute, activity concentration measurements are routinely performed and numerous calibration standards are required. Thus, a variety of calibration standards whose measurement geometry and chemical composition and density are similar to those of the measured samples were prepared. The standardized solutions of a common mixture of gamma-emitting radionuclides (241Am, 109Cd, 139Ce, 57Co, 60Co,137Cs, 203Hg, 113Sn, 85Sr, 88Y and 210Pb) purchased at the Czech Metrological Institute were used to prepare working standards for efficiency and energy calibration of gamma-ray semiconductor HPGe spectrometer in accordance with the IAEA recommendations. Calibration standards were prepared in different geometries (PVC cylindrical boxes, Marinelly beakers and PVC cylindrical bottles) and with various matrices (mineralized grass, activated carbon, surface soil, water, sand and ached filter paper). The matrix materials were spiked by using the activated carbon as the activity carrier, and homogenized mechanically. A comprehensive review of the procedures and techniques used for working standard preparation is presented in this paper.
PB  - Zagreb, Croatia : Croatian Radiation Protection Association
C3  - 9th Symposium of the Croatian Radiation Protection Association : Proceedings
T1  - O pripremi radnih standarda u gama spektrometriji
T1  - On the preparation of working standards for gamma-ray spectrometry
SP  - 520
EP  - 525
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12845
ER  - 

@conference{
author = "Vukanac, Ivana and Đurašević, Mirjana and Šešlak, Bojan and Kandić, Aleksandar and Milošević, Zoran",
year = "2013",
abstract = "Laboratorija za nuklearnu i plazma fiziku Instituta „Vinča“, Laboratoriji za metrologiju radionuklida (LMR), ovlašćena je i akreditovana za gamaspektrometrijska ispitivanja sadržaja radionuklida u uzorcima različitog porekla. Da bi se obezbedila tačnost i pouzdanost rezultata merenja, a po zahtevima standarda ISO 17025, vrše se periodična interna etaloniranja HPGe poluprovodničkih spektrometara. Zbog raznovrsnosti uzoraka koji se mere kalibracija se mora izvršiti za više različitih geometrija i matriksa. U većini Laboratorija za ispitivanje radioaktivnosti, zbog specifičnosti ispitivanih uzoraka i geometrija merenja, nedostatka materijalnih sredstava i sl., uglavnom postoji problem adekvatnosti i mogućnosti nabavke komercijalno dostupnih radioaktivnih standarda i referentnih materijala. Program internog etaloniranja se u LMR sprovodi pomoću radnih standarda napravljenih u skladu sa potrebama i iskustvima proizišlim iz dugogodišnje prakse, a pouzdanost merenja proverena je uspešnim učešćem na više međunarodnih interkomparacija i PT šema. Zbog konačnog veka trajanja radioaktivnih standarda, određenog vremenima poluraspada radionuklida prisutnih u standardu, u LMR su u više navrata pripremani setovi radnih standarda pomoću standardnog rastvora miksa radionuklida gama emitera [1], a po proceduri detaljno opisanoj u literaturi [2,3]. U radu će sumarno biti prezentovana iskustva stečena tokom primene procedura pripreme radnih standarda., In the Laboratory for Radionuclide Metrology at Vinča Institute, activity concentration measurements are routinely performed and numerous calibration standards are required. Thus, a variety of calibration standards whose measurement geometry and chemical composition and density are similar to those of the measured samples were prepared. The standardized solutions of a common mixture of gamma-emitting radionuclides (241Am, 109Cd, 139Ce, 57Co, 60Co,137Cs, 203Hg, 113Sn, 85Sr, 88Y and 210Pb) purchased at the Czech Metrological Institute were used to prepare working standards for efficiency and energy calibration of gamma-ray semiconductor HPGe spectrometer in accordance with the IAEA recommendations. Calibration standards were prepared in different geometries (PVC cylindrical boxes, Marinelly beakers and PVC cylindrical bottles) and with various matrices (mineralized grass, activated carbon, surface soil, water, sand and ached filter paper). The matrix materials were spiked by using the activated carbon as the activity carrier, and homogenized mechanically. A comprehensive review of the procedures and techniques used for working standard preparation is presented in this paper.",
publisher = "Zagreb, Croatia : Croatian Radiation Protection Association",
journal = "9th Symposium of the Croatian Radiation Protection Association : Proceedings",
title = "O pripremi radnih standarda u gama spektrometriji, On the preparation of working standards for gamma-ray spectrometry",
pages = "520-525",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12845"
}

Vukanac, I., Đurašević, M., Šešlak, B., Kandić, A.,& Milošević, Z.. (2013). O pripremi radnih standarda u gama spektrometriji. in 9th Symposium of the Croatian Radiation Protection Association : Proceedings
Zagreb, Croatia : Croatian Radiation Protection Association., 520-525.
https://hdl.handle.net/21.15107/rcub_vinar_12845

Vukanac I, Đurašević M, Šešlak B, Kandić A, Milošević Z. O pripremi radnih standarda u gama spektrometriji. in 9th Symposium of the Croatian Radiation Protection Association : Proceedings. 2013;:520-525.
https://hdl.handle.net/21.15107/rcub_vinar_12845 .

Vukanac, Ivana, Đurašević, Mirjana, Šešlak, Bojan, Kandić, Aleksandar, Milošević, Zoran, "O pripremi radnih standarda u gama spektrometriji" in 9th Symposium of the Croatian Radiation Protection Association : Proceedings (2013):520-525,
https://hdl.handle.net/21.15107/rcub_vinar_12845 .

TY  - CONF
AU  - Đurašević, Mirjana
AU  - Kandić, Aleksandar
AU  - Vukanac, Ivana
AU  - Šešlak, Bojan
AU  - Milošević, Zoran
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12822
AB  - Koincidentno sumiranje X i gama zračenja u spektru snimljenom na HPGe detektoru predstavlja jedan od najvažnijih problema u gama spektrometriji, naročito u bliskoj geometriji. Prisutni problem može se rešiti korišćenjem korekcionih faktora za koincidentno sumiranje. Cilj ovog rada je da se prikažu korekcioni faktori dobijeni korišćenjem matematičkog programa EFFTRAN. Korekcioni faktori izračunati su za neke prirodne radionuklide uranovog i torijumovog niza za slučaj geometrije cilindrične PVC kutijice od 200 ml sa matriksom zemlje.
AB  - Coincidence summing of X- and gamma-rays in spectra recorded by HPGe detectors is one of the most important problem in gamma ray spectrometry, especially at low source-detector distance. It could be solved by using coincidence summing correction factors. The aim of this paper is to present the correction factors obtained by using a mathematical program EFFTRAN. All correction factors were calculated for the some natural radionuclides of uranium and thorium series for the 200 ml PVC cylindrical box geometry with soil matrix.
PB  - Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 27. simpozijum DZZSCG : zbornik radova
T1  - Proračun korekcionih faktora za koincidentno sumiranje za neke prirordne radionuklide primenom Eftran softvera
T1  - Calculation of coincidence summing correction factors for some natural radionuclides usinG Efftran software
SP  - 431
EP  - 434
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12822
ER  - 

@conference{
author = "Đurašević, Mirjana and Kandić, Aleksandar and Vukanac, Ivana and Šešlak, Bojan and Milošević, Zoran",
year = "2013",
abstract = "Koincidentno sumiranje X i gama zračenja u spektru snimljenom na HPGe detektoru predstavlja jedan od najvažnijih problema u gama spektrometriji, naročito u bliskoj geometriji. Prisutni problem može se rešiti korišćenjem korekcionih faktora za koincidentno sumiranje. Cilj ovog rada je da se prikažu korekcioni faktori dobijeni korišćenjem matematičkog programa EFFTRAN. Korekcioni faktori izračunati su za neke prirodne radionuklide uranovog i torijumovog niza za slučaj geometrije cilindrične PVC kutijice od 200 ml sa matriksom zemlje., Coincidence summing of X- and gamma-rays in spectra recorded by HPGe detectors is one of the most important problem in gamma ray spectrometry, especially at low source-detector distance. It could be solved by using coincidence summing correction factors. The aim of this paper is to present the correction factors obtained by using a mathematical program EFFTRAN. All correction factors were calculated for the some natural radionuclides of uranium and thorium series for the 200 ml PVC cylindrical box geometry with soil matrix.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "27. simpozijum DZZSCG : zbornik radova",
title = "Proračun korekcionih faktora za koincidentno sumiranje za neke prirordne radionuklide primenom Eftran softvera, Calculation of coincidence summing correction factors for some natural radionuclides usinG Efftran software",
pages = "431-434",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12822"
}

Đurašević, M., Kandić, A., Vukanac, I., Šešlak, B.,& Milošević, Z.. (2013). Proračun korekcionih faktora za koincidentno sumiranje za neke prirordne radionuklide primenom Eftran softvera. in 27. simpozijum DZZSCG : zbornik radova
Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore., 431-434.
https://hdl.handle.net/21.15107/rcub_vinar_12822

Đurašević M, Kandić A, Vukanac I, Šešlak B, Milošević Z. Proračun korekcionih faktora za koincidentno sumiranje za neke prirordne radionuklide primenom Eftran softvera. in 27. simpozijum DZZSCG : zbornik radova. 2013;:431-434.
https://hdl.handle.net/21.15107/rcub_vinar_12822 .

Đurašević, Mirjana, Kandić, Aleksandar, Vukanac, Ivana, Šešlak, Bojan, Milošević, Zoran, "Proračun korekcionih faktora za koincidentno sumiranje za neke prirordne radionuklide primenom Eftran softvera" in 27. simpozijum DZZSCG : zbornik radova (2013):431-434,
https://hdl.handle.net/21.15107/rcub_vinar_12822 .

TY  - CONF
AU  - Vukanac, Ivana
AU  - Kandić, Aleksandar
AU  - Đurašević, Mirjana
AU  - Šešlak, Bojan
AU  - Čeliković, Igor
AU  - Milošević, Zoran
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12823
AB  - Three main ingredients of modern laundry detergent or washing powder are builders (50 % by weight, approximately), the alkylbenzenesulfonate surfactant (15 %), and bleaches (7 %). One of the most common builders (water softeners) is sodium triphosphate. Mainly, detergent ingredients have low biodegradation rate in environment resulting in a number of negative effects. Additionally, heavy use of soluble sodium triphosphate eventually discharged into natural waters lead to problem with eutrophication of lakes and streams. Also, phosphate deposits can contain significant amounts of naturally occurring heavy metals (cadmium, lead, nickel, copper, chromium, and uranium). For these reasons wastewater containing phosphate detergents should be directed to the sewerage system. In order to provide a high level of protection of the environment, the European Union introduced regulations to require biodegradability in all detergents in 2004 [1], and intends to ban phosphates in domestic products from 2013 [2]. Presence of the phosphates in sample, in most cases indicates the presence of uranium and its daughter products. In order to perceive the radiological aspect of environmental pollution by wastewater, the analysis of laundry detergent available on Serbian market was undertaken. Measurements were performed by means of HPGe gamma spectrometer (35 % relative efficiency) in accordance with international recommendation [3]. Ten samples were placed in Marinelly bakers, sealed for six weeks and after reaching radioactive equilibrium measured. Total count rates in recorded spectra ranged from 2.32 s-1kg-1 to 3.69 s-1kg-1. Specific activities of 210Pb ranged from 3 to 11.1 Bqkg1, 40K from 1.25 to 22.2 Bqkg-1, 226Ra from 0.1 to 8.6 Bqkg-1; concentrations of 238U and 232Th were up to 6.6 Bqkg-1 and 1.1 Bqkg-1, respectively, while artificial radionuclides were below MDA (137Cs<0.04 Bqkg-1). Analysis of the obtained results showed that laundry detergents mostly used in Serbia have low content of radionuclides, but still considering the quantities used annually (~107 kg), this aspect of environmental pollution through wastewaters can not be neglected. Also, it should be mentioned that in facilities for wastewater treatment during the technological processes involved in water purification, precipitation and accumulation of radioactivity can occur, although the content of radionuclides is not expected to be high.
PB  - University of Niš : Faculty of Electronic Engineering
C3  - RAD 2012 : 1st International Conference on Radiation in Various Fields of Research : Book of abstracts
T1  - Radionuclide content in laundry detergents available in Serbian market
SP  - 162
EP  - 162
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12823
ER  - 

@conference{
author = "Vukanac, Ivana and Kandić, Aleksandar and Đurašević, Mirjana and Šešlak, Bojan and Čeliković, Igor and Milošević, Zoran",
year = "2012",
abstract = "Three main ingredients of modern laundry detergent or washing powder are builders (50 % by weight, approximately), the alkylbenzenesulfonate surfactant (15 %), and bleaches (7 %). One of the most common builders (water softeners) is sodium triphosphate. Mainly, detergent ingredients have low biodegradation rate in environment resulting in a number of negative effects. Additionally, heavy use of soluble sodium triphosphate eventually discharged into natural waters lead to problem with eutrophication of lakes and streams. Also, phosphate deposits can contain significant amounts of naturally occurring heavy metals (cadmium, lead, nickel, copper, chromium, and uranium). For these reasons wastewater containing phosphate detergents should be directed to the sewerage system. In order to provide a high level of protection of the environment, the European Union introduced regulations to require biodegradability in all detergents in 2004 [1], and intends to ban phosphates in domestic products from 2013 [2]. Presence of the phosphates in sample, in most cases indicates the presence of uranium and its daughter products. In order to perceive the radiological aspect of environmental pollution by wastewater, the analysis of laundry detergent available on Serbian market was undertaken. Measurements were performed by means of HPGe gamma spectrometer (35 % relative efficiency) in accordance with international recommendation [3]. Ten samples were placed in Marinelly bakers, sealed for six weeks and after reaching radioactive equilibrium measured. Total count rates in recorded spectra ranged from 2.32 s-1kg-1 to 3.69 s-1kg-1. Specific activities of 210Pb ranged from 3 to 11.1 Bqkg1, 40K from 1.25 to 22.2 Bqkg-1, 226Ra from 0.1 to 8.6 Bqkg-1; concentrations of 238U and 232Th were up to 6.6 Bqkg-1 and 1.1 Bqkg-1, respectively, while artificial radionuclides were below MDA (137Cs<0.04 Bqkg-1). Analysis of the obtained results showed that laundry detergents mostly used in Serbia have low content of radionuclides, but still considering the quantities used annually (~107 kg), this aspect of environmental pollution through wastewaters can not be neglected. Also, it should be mentioned that in facilities for wastewater treatment during the technological processes involved in water purification, precipitation and accumulation of radioactivity can occur, although the content of radionuclides is not expected to be high.",
publisher = "University of Niš : Faculty of Electronic Engineering",
journal = "RAD 2012 : 1st International Conference on Radiation in Various Fields of Research : Book of abstracts",
title = "Radionuclide content in laundry detergents available in Serbian market",
pages = "162-162",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12823"
}

Vukanac, I., Kandić, A., Đurašević, M., Šešlak, B., Čeliković, I.,& Milošević, Z.. (2012). Radionuclide content in laundry detergents available in Serbian market. in RAD 2012 : 1st International Conference on Radiation in Various Fields of Research : Book of abstracts
University of Niš : Faculty of Electronic Engineering., 162-162.
https://hdl.handle.net/21.15107/rcub_vinar_12823

Vukanac I, Kandić A, Đurašević M, Šešlak B, Čeliković I, Milošević Z. Radionuclide content in laundry detergents available in Serbian market. in RAD 2012 : 1st International Conference on Radiation in Various Fields of Research : Book of abstracts. 2012;:162-162.
https://hdl.handle.net/21.15107/rcub_vinar_12823 .

Vukanac, Ivana, Kandić, Aleksandar, Đurašević, Mirjana, Šešlak, Bojan, Čeliković, Igor, Milošević, Zoran, "Radionuclide content in laundry detergents available in Serbian market" in RAD 2012 : 1st International Conference on Radiation in Various Fields of Research : Book of abstracts (2012):162-162,
https://hdl.handle.net/21.15107/rcub_vinar_12823 .

TY  - JOUR
AU  - Novikovic, Dusan N.
AU  - Nađđerđ, Laslo
AU  - Đurašević, Mirjana M.
AU  - Vukanac, Ivana
AU  - Kandić, Aleksandar
AU  - Milošević, Zoran
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4354
T2  - Nuclear technology and radiation protection
T1  - Erratum: The Direct Activity Measurement of Ba-133 By Using the HPGe Spectrometer (Vol 26, Pg 64, 2011)
VL  - 27
IS  - 1
SP  - 93
EP  - 93
UR  - https://hdl.handle.net/21.15107/rcub_vinar_4354
ER  - 

@article{
author = "Novikovic, Dusan N. and Nađđerđ, Laslo and Đurašević, Mirjana M. and Vukanac, Ivana and Kandić, Aleksandar and Milošević, Zoran",
year = "2012",
journal = "Nuclear technology and radiation protection",
title = "Erratum: The Direct Activity Measurement of Ba-133 By Using the HPGe Spectrometer (Vol 26, Pg 64, 2011)",
volume = "27",
number = "1",
pages = "93-93",
url = "https://hdl.handle.net/21.15107/rcub_vinar_4354"
}

Novikovic, D. N., Nađđerđ, L., Đurašević, M. M., Vukanac, I., Kandić, A.,& Milošević, Z.. (2012). Erratum: The Direct Activity Measurement of Ba-133 By Using the HPGe Spectrometer (Vol 26, Pg 64, 2011). in Nuclear technology and radiation protection, 27(1), 93-93.
https://hdl.handle.net/21.15107/rcub_vinar_4354

Novikovic DN, Nađđerđ L, Đurašević MM, Vukanac I, Kandić A, Milošević Z. Erratum: The Direct Activity Measurement of Ba-133 By Using the HPGe Spectrometer (Vol 26, Pg 64, 2011). in Nuclear technology and radiation protection. 2012;27(1):93-93.
https://hdl.handle.net/21.15107/rcub_vinar_4354 .

Novikovic, Dusan N., Nađđerđ, Laslo, Đurašević, Mirjana M., Vukanac, Ivana, Kandić, Aleksandar, Milošević, Zoran, "Erratum: The Direct Activity Measurement of Ba-133 By Using the HPGe Spectrometer (Vol 26, Pg 64, 2011)" in Nuclear technology and radiation protection, 27, no. 1 (2012):93-93,
https://hdl.handle.net/21.15107/rcub_vinar_4354 .

TY  - JOUR
AU  - Novković, Dušan N.
AU  - Kandić, Aleksandar
AU  - Vukanac, Ivana
AU  - Đurašević, Mirjana M.
AU  - Milošević, Zoran
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6971
AB  - The direct measurement of the activities of Co-57 sources by application of the sum-peak method recently developed by Novkovic et al., is described in this paper. The comprehensive assessment of the uncertainty budget of the activity of the measured sources has been analyzed. The presented method is successfully tested using an HPGe spectrometer with efficiencies of 50%. The accuracy of this method is confirmed to be comparable with the commonly used methods of the activity measurement of Co-57. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Applied Radiation and Isotopes
T1  - The direct measurement of Co-57 activity by the sum-peak method
VL  - 70
IS  - 9
SP  - 2154
EP  - 2156
DO  - 10.1016/j.apradiso.2012.02.088
ER  - 

@article{
author = "Novković, Dušan N. and Kandić, Aleksandar and Vukanac, Ivana and Đurašević, Mirjana M. and Milošević, Zoran",
year = "2012",
abstract = "The direct measurement of the activities of Co-57 sources by application of the sum-peak method recently developed by Novkovic et al., is described in this paper. The comprehensive assessment of the uncertainty budget of the activity of the measured sources has been analyzed. The presented method is successfully tested using an HPGe spectrometer with efficiencies of 50%. The accuracy of this method is confirmed to be comparable with the commonly used methods of the activity measurement of Co-57. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Applied Radiation and Isotopes",
title = "The direct measurement of Co-57 activity by the sum-peak method",
volume = "70",
number = "9",
pages = "2154-2156",
doi = "10.1016/j.apradiso.2012.02.088"
}

Novković, D. N., Kandić, A., Vukanac, I., Đurašević, M. M.,& Milošević, Z.. (2012). The direct measurement of Co-57 activity by the sum-peak method. in Applied Radiation and Isotopes, 70(9), 2154-2156.
https://doi.org/10.1016/j.apradiso.2012.02.088

Novković DN, Kandić A, Vukanac I, Đurašević MM, Milošević Z. The direct measurement of Co-57 activity by the sum-peak method. in Applied Radiation and Isotopes. 2012;70(9):2154-2156.
doi:10.1016/j.apradiso.2012.02.088 .

Novković, Dušan N., Kandić, Aleksandar, Vukanac, Ivana, Đurašević, Mirjana M., Milošević, Zoran, "The direct measurement of Co-57 activity by the sum-peak method" in Applied Radiation and Isotopes, 70, no. 9 (2012):2154-2156,
https://doi.org/10.1016/j.apradiso.2012.02.088 . .

TY  - JOUR
AU  - Novković, Dušan N.
AU  - Vukanac, Ivana
AU  - Kandić, Aleksandar
AU  - Đurašević, Mirjana M.
AU  - Milošević, Zoran
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4734
AB  - A study of coincidence summing of X- and gamma rays of Se-75 has been presented in this paper. The computation of the Se-75 spectra was performed by application of the previously published theory by Novkovi et al. The method enables the treatment of all possible single and sum peaks of Se-75. The calculation gave the 419 decay path outcomes, resulting in 84 peak count rate equations and also the total count rate equation. By HPGe spectrometers with 15% and 18% relative efficiency, 20 and 30 peaks were recorded, respectively. Some simplification of the decay scheme was introduced and existing metastable level had to be treated separately. Nevertheless, the experimental values of the peak count rates were in good agreement with the theoretical evaluation. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Applied Radiation and Isotopes
T1  - Coincidence summing of X- and gamma rays of Se-75
VL  - 70
IS  - 3
SP  - 520
EP  - 527
DO  - 10.1016/j.apradiso.2011.10.001
ER  - 

@article{
author = "Novković, Dušan N. and Vukanac, Ivana and Kandić, Aleksandar and Đurašević, Mirjana M. and Milošević, Zoran",
year = "2012",
abstract = "A study of coincidence summing of X- and gamma rays of Se-75 has been presented in this paper. The computation of the Se-75 spectra was performed by application of the previously published theory by Novkovi et al. The method enables the treatment of all possible single and sum peaks of Se-75. The calculation gave the 419 decay path outcomes, resulting in 84 peak count rate equations and also the total count rate equation. By HPGe spectrometers with 15% and 18% relative efficiency, 20 and 30 peaks were recorded, respectively. Some simplification of the decay scheme was introduced and existing metastable level had to be treated separately. Nevertheless, the experimental values of the peak count rates were in good agreement with the theoretical evaluation. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Applied Radiation and Isotopes",
title = "Coincidence summing of X- and gamma rays of Se-75",
volume = "70",
number = "3",
pages = "520-527",
doi = "10.1016/j.apradiso.2011.10.001"
}

Novković, D. N., Vukanac, I., Kandić, A., Đurašević, M. M.,& Milošević, Z.. (2012). Coincidence summing of X- and gamma rays of Se-75. in Applied Radiation and Isotopes, 70(3), 520-527.
https://doi.org/10.1016/j.apradiso.2011.10.001

Novković DN, Vukanac I, Kandić A, Đurašević MM, Milošević Z. Coincidence summing of X- and gamma rays of Se-75. in Applied Radiation and Isotopes. 2012;70(3):520-527.
doi:10.1016/j.apradiso.2011.10.001 .

Novković, Dušan N., Vukanac, Ivana, Kandić, Aleksandar, Đurašević, Mirjana M., Milošević, Zoran, "Coincidence summing of X- and gamma rays of Se-75" in Applied Radiation and Isotopes, 70, no. 3 (2012):520-527,
https://doi.org/10.1016/j.apradiso.2011.10.001 . .

TY  - JOUR
AU  - Kandić, Aleksandar
AU  - Vukanac, Ivana
AU  - Đurašević, Mirjana M.
AU  - Novković, Dušan N.
AU  - Šešlak, Bojan Ž.
AU  - Milošević, Zoran
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6969
AB  - In order to assure Quality Control in accordance with ISO/IEC 17025, it was important, from metrological point of view, to examine the long-term stability of calibration standards previously prepared. Comprehensive reconsideration on efficiency curves with respect to the ageing of calibration standards is presented in this paper. The calibration standards were re-used after a period of 5 years and analysis of the results showed discrepancies in efficiency values. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Applied Radiation and Isotopes
T1  - On the long-term stability of calibration standards in different matrices
VL  - 70
IS  - 9
SP  - 1860
EP  - 1862
DO  - 10.1016/j.apradiso.2012.02.025
ER  - 

@article{
author = "Kandić, Aleksandar and Vukanac, Ivana and Đurašević, Mirjana M. and Novković, Dušan N. and Šešlak, Bojan Ž. and Milošević, Zoran",
year = "2012",
abstract = "In order to assure Quality Control in accordance with ISO/IEC 17025, it was important, from metrological point of view, to examine the long-term stability of calibration standards previously prepared. Comprehensive reconsideration on efficiency curves with respect to the ageing of calibration standards is presented in this paper. The calibration standards were re-used after a period of 5 years and analysis of the results showed discrepancies in efficiency values. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Applied Radiation and Isotopes",
title = "On the long-term stability of calibration standards in different matrices",
volume = "70",
number = "9",
pages = "1860-1862",
doi = "10.1016/j.apradiso.2012.02.025"
}

Kandić, A., Vukanac, I., Đurašević, M. M., Novković, D. N., Šešlak, B. Ž.,& Milošević, Z.. (2012). On the long-term stability of calibration standards in different matrices. in Applied Radiation and Isotopes, 70(9), 1860-1862.
https://doi.org/10.1016/j.apradiso.2012.02.025

Kandić A, Vukanac I, Đurašević MM, Novković DN, Šešlak BŽ, Milošević Z. On the long-term stability of calibration standards in different matrices. in Applied Radiation and Isotopes. 2012;70(9):1860-1862.
doi:10.1016/j.apradiso.2012.02.025 .

Kandić, Aleksandar, Vukanac, Ivana, Đurašević, Mirjana M., Novković, Dušan N., Šešlak, Bojan Ž., Milošević, Zoran, "On the long-term stability of calibration standards in different matrices" in Applied Radiation and Isotopes, 70, no. 9 (2012):1860-1862,
https://doi.org/10.1016/j.apradiso.2012.02.025 . .

TY  - CONF
AU  - Đurašević, Mirjana
AU  - Vukanac, Ivana
AU  - Kandić, Aleksandar
AU  - Šešlak, Bojan
AU  - Milošević, Zoran
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12844
AB  - Učešće u interkomparativnim merenjima, za laboratorije akreditovane po standardu SRPS ISO/IEC 17025:2006 predstavlja vid eksterne kontrole kvaliteta. Na taj način akreditovana laboratorija potvrĎuje tačnost, pouzdanost i reproducibilnost akreditovane metode. Evropski centri kao što su IAEA, JRC, i IRMM u okviru svojih redovnih aktivnosti imaju obavezu organizacije i realizacije programa interkomparativnih merenja. Jedan deo tih programa odnosi se na merenje sadrţaja prirodnih i veštačkih radionuklida u uzorcima iz okoline. Laboratorija za nuklearnu i plazma fiziku, Instituta "Vinča", redovno učestvuje na nekom od takvih programa u cilju obezbedjenja kvaliteta rezultata ispitivanja. U toku 2008. i 2009. godine učestvovali smo na dve interkomparativne kampanje organizovane od strane Grupe za Referentne Materijale (Reference Materials Group) u sklopu IAEA (International Atomic Energy Agency):  The IAEA-CU-2008-03 Worldwide open proficiency test: OdreĎivanje prirodnih radionuklida u fosfogipsu i vodi.  The IAEA-CU-2009-03 Worldwide open proficiency test: OdreĎivanje prirodnih i veštačkih radionuklida u zemljištu sa mahovinom i spajkovanoj vodi.
AB  - Laboratories accredited in accordance with ISO / IEC 17025:2006 have an obligation to participate periodicaly in intercomparison campaigns organised by international centres of excellence in the field of interest. These external quality control exercises confirm the accuracy, reliability and reproducibility of accredited methods. European centers (IAEA, JRC, IRMM) have an obligation, as one of their regular activities, to organize and implement programs of intercomparison measurements. Manny of these programs relate to measurement of natural and artificial radionuclides in environmental samples. Laboratory for Nuclear and Plasma Physics, Institute "Vinča", participated in two worldwide open proficiency tests organised in 2008 and 2009 by the Group for Reference Materials under the IAEA:  The IAEA-CU-2008-03: Determination of naturally occurring radionuclides in phosphogypsum and water.  The IAEA-CU-2009-03: Determination of natural and artificial radionuclides in moss-soil and spiked water. The results of measurements of phosphogypsum, moss soil and water samples are presented in this paper. The specific activities of naturally occurring gamma emitters originated from uranium and thorium series were determined in the phosphogypsum and moss soil samples. Besides them, the content of: 57Co, 60Co, 65Zn, 134Cs, 137Cs, 54Mn, 133Ba and 152Eu were determined in water samples.  The obtained results showed generally a very good agreement with referent values of specific activities given by IAEA. The accuracy and precision of the reported results were acceptable. The comprehensive analysis of obtained results enabled the elimination of the observed oversights and the improvement and validation of method for gamma spectrometric analysis of environmental samples
PB  - Zagreb : Croatian Radiation Protection Association
C3  - 8th Symposium of the Croatian Radiation Protection Association : Proceedings
T1  - Određivanje sadržaja radionuklida u okviru međunarodnih interkomparativnih merenja – IAEA-CU-2008-03 i IAEA-CU-2009-03
T1  - Radionuclide content determination within the international intercomparison campaigns – IAEA-CU-2008-03 and IAEA-CU-2009-03
SP  - 474
EP  - 479
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12844
ER  - 

@conference{
author = "Đurašević, Mirjana and Vukanac, Ivana and Kandić, Aleksandar and Šešlak, Bojan and Milošević, Zoran",
year = "2011",
abstract = "Učešće u interkomparativnim merenjima, za laboratorije akreditovane po standardu SRPS ISO/IEC 17025:2006 predstavlja vid eksterne kontrole kvaliteta. Na taj način akreditovana laboratorija potvrĎuje tačnost, pouzdanost i reproducibilnost akreditovane metode. Evropski centri kao što su IAEA, JRC, i IRMM u okviru svojih redovnih aktivnosti imaju obavezu organizacije i realizacije programa interkomparativnih merenja. Jedan deo tih programa odnosi se na merenje sadrţaja prirodnih i veštačkih radionuklida u uzorcima iz okoline. Laboratorija za nuklearnu i plazma fiziku, Instituta "Vinča", redovno učestvuje na nekom od takvih programa u cilju obezbedjenja kvaliteta rezultata ispitivanja. U toku 2008. i 2009. godine učestvovali smo na dve interkomparativne kampanje organizovane od strane Grupe za Referentne Materijale (Reference Materials Group) u sklopu IAEA (International Atomic Energy Agency):  The IAEA-CU-2008-03 Worldwide open proficiency test: OdreĎivanje prirodnih radionuklida u fosfogipsu i vodi.  The IAEA-CU-2009-03 Worldwide open proficiency test: OdreĎivanje prirodnih i veštačkih radionuklida u zemljištu sa mahovinom i spajkovanoj vodi., Laboratories accredited in accordance with ISO / IEC 17025:2006 have an obligation to participate periodicaly in intercomparison campaigns organised by international centres of excellence in the field of interest. These external quality control exercises confirm the accuracy, reliability and reproducibility of accredited methods. European centers (IAEA, JRC, IRMM) have an obligation, as one of their regular activities, to organize and implement programs of intercomparison measurements. Manny of these programs relate to measurement of natural and artificial radionuclides in environmental samples. Laboratory for Nuclear and Plasma Physics, Institute "Vinča", participated in two worldwide open proficiency tests organised in 2008 and 2009 by the Group for Reference Materials under the IAEA:  The IAEA-CU-2008-03: Determination of naturally occurring radionuclides in phosphogypsum and water.  The IAEA-CU-2009-03: Determination of natural and artificial radionuclides in moss-soil and spiked water. The results of measurements of phosphogypsum, moss soil and water samples are presented in this paper. The specific activities of naturally occurring gamma emitters originated from uranium and thorium series were determined in the phosphogypsum and moss soil samples. Besides them, the content of: 57Co, 60Co, 65Zn, 134Cs, 137Cs, 54Mn, 133Ba and 152Eu were determined in water samples.  The obtained results showed generally a very good agreement with referent values of specific activities given by IAEA. The accuracy and precision of the reported results were acceptable. The comprehensive analysis of obtained results enabled the elimination of the observed oversights and the improvement and validation of method for gamma spectrometric analysis of environmental samples",
publisher = "Zagreb : Croatian Radiation Protection Association",
journal = "8th Symposium of the Croatian Radiation Protection Association : Proceedings",
title = "Određivanje sadržaja radionuklida u okviru međunarodnih interkomparativnih merenja – IAEA-CU-2008-03 i IAEA-CU-2009-03, Radionuclide content determination within the international intercomparison campaigns – IAEA-CU-2008-03 and IAEA-CU-2009-03",
pages = "474-479",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12844"
}

Đurašević, M., Vukanac, I., Kandić, A., Šešlak, B.,& Milošević, Z.. (2011). Određivanje sadržaja radionuklida u okviru međunarodnih interkomparativnih merenja – IAEA-CU-2008-03 i IAEA-CU-2009-03. in 8th Symposium of the Croatian Radiation Protection Association : Proceedings
Zagreb : Croatian Radiation Protection Association., 474-479.
https://hdl.handle.net/21.15107/rcub_vinar_12844

Đurašević M, Vukanac I, Kandić A, Šešlak B, Milošević Z. Određivanje sadržaja radionuklida u okviru međunarodnih interkomparativnih merenja – IAEA-CU-2008-03 i IAEA-CU-2009-03. in 8th Symposium of the Croatian Radiation Protection Association : Proceedings. 2011;:474-479.
https://hdl.handle.net/21.15107/rcub_vinar_12844 .

Đurašević, Mirjana, Vukanac, Ivana, Kandić, Aleksandar, Šešlak, Bojan, Milošević, Zoran, "Određivanje sadržaja radionuklida u okviru međunarodnih interkomparativnih merenja – IAEA-CU-2008-03 i IAEA-CU-2009-03" in 8th Symposium of the Croatian Radiation Protection Association : Proceedings (2011):474-479,
https://hdl.handle.net/21.15107/rcub_vinar_12844 .

TY  - JOUR
AU  - Novković, Dušan N.
AU  - Nađđerđ, Laslo
AU  - Đurašević, Mirjana M.
AU  - Vukanac, Ivana
AU  - Kandić, Aleksandar
AU  - Milošević, Zoran
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4297
AB  - The direct measurement of Ba-133 source activity by the application of the theoretical count rate equations has been recently developed by Novkovic et al. The analytical and Monte Carlo calculation of activity measurement uncertainties were described in previously published papers for the case of one recorded spectra. The procedure of uncertainty calculation for a sequence of successively recorded spectra, enabling the determination of the correlation between peak count rates, is presented in this paper. The uncertainty of activity obtained by the described method is caused by the uncertainty of the experimentally obtained input data and uncertainties of the used nuclear decay data.
T2  - Nuclear technology and radiation protection
T1  - The Direct Activity Measurement of Ba-133 By Using HPGe Spectrometer
VL  - 26
IS  - 1
SP  - 64
EP  - 68
DO  - 10.2298/NTRP1101064N
ER  - 

@article{
author = "Novković, Dušan N. and Nađđerđ, Laslo and Đurašević, Mirjana M. and Vukanac, Ivana and Kandić, Aleksandar and Milošević, Zoran",
year = "2011",
abstract = "The direct measurement of Ba-133 source activity by the application of the theoretical count rate equations has been recently developed by Novkovic et al. The analytical and Monte Carlo calculation of activity measurement uncertainties were described in previously published papers for the case of one recorded spectra. The procedure of uncertainty calculation for a sequence of successively recorded spectra, enabling the determination of the correlation between peak count rates, is presented in this paper. The uncertainty of activity obtained by the described method is caused by the uncertainty of the experimentally obtained input data and uncertainties of the used nuclear decay data.",
journal = "Nuclear technology and radiation protection",
title = "The Direct Activity Measurement of Ba-133 By Using HPGe Spectrometer",
volume = "26",
number = "1",
pages = "64-68",
doi = "10.2298/NTRP1101064N"
}

Novković, D. N., Nađđerđ, L., Đurašević, M. M., Vukanac, I., Kandić, A.,& Milošević, Z.. (2011). The Direct Activity Measurement of Ba-133 By Using HPGe Spectrometer. in Nuclear technology and radiation protection, 26(1), 64-68.
https://doi.org/10.2298/NTRP1101064N

Novković DN, Nađđerđ L, Đurašević MM, Vukanac I, Kandić A, Milošević Z. The Direct Activity Measurement of Ba-133 By Using HPGe Spectrometer. in Nuclear technology and radiation protection. 2011;26(1):64-68.
doi:10.2298/NTRP1101064N .

Novković, Dušan N., Nađđerđ, Laslo, Đurašević, Mirjana M., Vukanac, Ivana, Kandić, Aleksandar, Milošević, Zoran, "The Direct Activity Measurement of Ba-133 By Using HPGe Spectrometer" in Nuclear technology and radiation protection, 26, no. 1 (2011):64-68,
https://doi.org/10.2298/NTRP1101064N . .

TY  - JOUR
AU  - Vukanac, Ivana
AU  - Novković, Dušan N.
AU  - Kandić, Aleksandar
AU  - Đurašević, Mirjana M.
AU  - Milošević, Zoran
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6876
AB  - A simple and efficient method for determination of uranium content in surface soil samples contaminated with depleted uranium, by gamma ray spectrometry is presented. The content of natural uranium and depleted uranium, as well as the activity ratio (235)U/(238)U of depleted uranium, were determined in contaminated surface soil samples by application of this method (C) 2009 Elsevier Ltd All rights reserved
T2  - Applied Radiation and Isotopes
T1  - A simple method for determination of natural and depleted uranium in surface soil samples
VL  - 68
IS  - 7-8
SP  - 1433
EP  - 1434
DO  - 10.1016/j.apradiso.2009.11.056
ER  - 

@article{
author = "Vukanac, Ivana and Novković, Dušan N. and Kandić, Aleksandar and Đurašević, Mirjana M. and Milošević, Zoran",
year = "2010",
abstract = "A simple and efficient method for determination of uranium content in surface soil samples contaminated with depleted uranium, by gamma ray spectrometry is presented. The content of natural uranium and depleted uranium, as well as the activity ratio (235)U/(238)U of depleted uranium, were determined in contaminated surface soil samples by application of this method (C) 2009 Elsevier Ltd All rights reserved",
journal = "Applied Radiation and Isotopes",
title = "A simple method for determination of natural and depleted uranium in surface soil samples",
volume = "68",
number = "7-8",
pages = "1433-1434",
doi = "10.1016/j.apradiso.2009.11.056"
}

Vukanac, I., Novković, D. N., Kandić, A., Đurašević, M. M.,& Milošević, Z.. (2010). A simple method for determination of natural and depleted uranium in surface soil samples. in Applied Radiation and Isotopes, 68(7-8), 1433-1434.
https://doi.org/10.1016/j.apradiso.2009.11.056

Vukanac I, Novković DN, Kandić A, Đurašević MM, Milošević Z. A simple method for determination of natural and depleted uranium in surface soil samples. in Applied Radiation and Isotopes. 2010;68(7-8):1433-1434.
doi:10.1016/j.apradiso.2009.11.056 .

Vukanac, Ivana, Novković, Dušan N., Kandić, Aleksandar, Đurašević, Mirjana M., Milošević, Zoran, "A simple method for determination of natural and depleted uranium in surface soil samples" in Applied Radiation and Isotopes, 68, no. 7-8 (2010):1433-1434,
https://doi.org/10.1016/j.apradiso.2009.11.056 . .

TY  - CONF
AU  - Đurašević, Mirjana
AU  - Kusić, Dragana
AU  - Vukanac, Ivana
AU  - Kandić, Aleksandar
AU  - Milošević, Zoran
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12761
AB  - U radu je izložena brza i jednostavna metoda za određivanje ukupne alfa aktivnosti u vodi. Opisana metoda podrazumeva kvantitativnu koprecipitaciju radijuma Ba+2 jonima i naknadnu koprecipitaciju aktinida sa Fe+3 jonima uz kontrolu pH taloženja. Za merenje ukupne alfa aktivnosti koristi se ZnS(Ag) scintilacioni detektor.
AB  - In this work, a rapid and easy method for the determination of gross alpha activity in water is presented. The method described here is a coprecipitation of radium with barium and subsequent coprecipitation of the actinides with Fe+3 carrier. For determination of gross alphaactivity is used ZnS(Ag) scintillation detector.
PB  - Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 25. simpozijum DZZSCG : zbornik radova
T1  - Određivanje ukupne alfa aktivnosti vode metodom koprecipitacije
T1  - Rapid determination of gross alpha-activity in water by coprecipitation
SP  - 114
EP  - 117
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12761
ER  - 

@conference{
author = "Đurašević, Mirjana and Kusić, Dragana and Vukanac, Ivana and Kandić, Aleksandar and Milošević, Zoran",
year = "2009",
abstract = "U radu je izložena brza i jednostavna metoda za određivanje ukupne alfa aktivnosti u vodi. Opisana metoda podrazumeva kvantitativnu koprecipitaciju radijuma Ba+2 jonima i naknadnu koprecipitaciju aktinida sa Fe+3 jonima uz kontrolu pH taloženja. Za merenje ukupne alfa aktivnosti koristi se ZnS(Ag) scintilacioni detektor., In this work, a rapid and easy method for the determination of gross alpha activity in water is presented. The method described here is a coprecipitation of radium with barium and subsequent coprecipitation of the actinides with Fe+3 carrier. For determination of gross alphaactivity is used ZnS(Ag) scintillation detector.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "25. simpozijum DZZSCG : zbornik radova",
title = "Određivanje ukupne alfa aktivnosti vode metodom koprecipitacije, Rapid determination of gross alpha-activity in water by coprecipitation",
pages = "114-117",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12761"
}

Đurašević, M., Kusić, D., Vukanac, I., Kandić, A.,& Milošević, Z.. (2009). Određivanje ukupne alfa aktivnosti vode metodom koprecipitacije. in 25. simpozijum DZZSCG : zbornik radova
Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore., 114-117.
https://hdl.handle.net/21.15107/rcub_vinar_12761

Đurašević M, Kusić D, Vukanac I, Kandić A, Milošević Z. Određivanje ukupne alfa aktivnosti vode metodom koprecipitacije. in 25. simpozijum DZZSCG : zbornik radova. 2009;:114-117.
https://hdl.handle.net/21.15107/rcub_vinar_12761 .

Đurašević, Mirjana, Kusić, Dragana, Vukanac, Ivana, Kandić, Aleksandar, Milošević, Zoran, "Određivanje ukupne alfa aktivnosti vode metodom koprecipitacije" in 25. simpozijum DZZSCG : zbornik radova (2009):114-117,
https://hdl.handle.net/21.15107/rcub_vinar_12761 .

TY  - JOUR
AU  - Novković, Dušan N.
AU  - Nađđerđ, Laslo
AU  - Đurašević, Mirjana M.
AU  - Vukanac, Ivana
AU  - Kandić, Aleksandar
AU  - Milošević, Zoran
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3786
AB  - The subject is a direct measurement of the activities of Ba-133 sources by application of the theoretical count rate expressions recently developed by Novkovic et al. The total uncertainties of the activity of the measured sources, obtained in two manners, are described in this paper. The presented method is successfully tested using a germanium spectrometer with efficiencies of 50%. The accuracy of this method is proved to be comparable with the present methods of the activity measurement of Ba-133. (c) 2009 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - The direct measurement of Ba-133 activity by the sum-peak method
VL  - 608
IS  - 1
SP  - 116
EP  - 120
DO  - 10.1016/j.nima.2009.06.042
ER  - 

@article{
author = "Novković, Dušan N. and Nađđerđ, Laslo and Đurašević, Mirjana M. and Vukanac, Ivana and Kandić, Aleksandar and Milošević, Zoran",
year = "2009",
abstract = "The subject is a direct measurement of the activities of Ba-133 sources by application of the theoretical count rate expressions recently developed by Novkovic et al. The total uncertainties of the activity of the measured sources, obtained in two manners, are described in this paper. The presented method is successfully tested using a germanium spectrometer with efficiencies of 50%. The accuracy of this method is proved to be comparable with the present methods of the activity measurement of Ba-133. (c) 2009 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "The direct measurement of Ba-133 activity by the sum-peak method",
volume = "608",
number = "1",
pages = "116-120",
doi = "10.1016/j.nima.2009.06.042"
}

Novković, D. N., Nađđerđ, L., Đurašević, M. M., Vukanac, I., Kandić, A.,& Milošević, Z.. (2009). The direct measurement of Ba-133 activity by the sum-peak method. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 608(1), 116-120.
https://doi.org/10.1016/j.nima.2009.06.042

Novković DN, Nađđerđ L, Đurašević MM, Vukanac I, Kandić A, Milošević Z. The direct measurement of Ba-133 activity by the sum-peak method. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2009;608(1):116-120.
doi:10.1016/j.nima.2009.06.042 .

Novković, Dušan N., Nađđerđ, Laslo, Đurašević, Mirjana M., Vukanac, Ivana, Kandić, Aleksandar, Milošević, Zoran, "The direct measurement of Ba-133 activity by the sum-peak method" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 608, no. 1 (2009):116-120,
https://doi.org/10.1016/j.nima.2009.06.042 . .

TY  - JOUR
AU  - Vukanac, Ivana
AU  - Đurašević, Mirjana M.
AU  - Kandić, Aleksandar
AU  - Novković, Dušan N.
AU  - Nađđerđ, Laslo
AU  - Milošević, Zoran
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6756
AB  - A review of the calibration procedures of the semiconductor HPGe spectrometer is presented in this paper. Calibration standards were prepared using the standardized radioactive solution of the common monoenergetic radionuclides mixture and standardized multigamma Eu-152 solution. The matrix materials were spiked using the activated carbon, and homogenized mechanically or by suspension in C2H5OH. Experimentally determined efficiency curves were compared with those obtained by Monte Carlo simulation. (C) 2008 Elsevier Ltd. All rights reserved.
T2  - Applied Radiation and Isotopes
T1  - Experimental determination of the HPGe spectrometer efficiency curve
VL  - 66
IS  - 6-7
SP  - 792
EP  - 795
DO  - 10.1016/j.apradiso.2008.02.039
ER  - 

@article{
author = "Vukanac, Ivana and Đurašević, Mirjana M. and Kandić, Aleksandar and Novković, Dušan N. and Nađđerđ, Laslo and Milošević, Zoran",
year = "2008",
abstract = "A review of the calibration procedures of the semiconductor HPGe spectrometer is presented in this paper. Calibration standards were prepared using the standardized radioactive solution of the common monoenergetic radionuclides mixture and standardized multigamma Eu-152 solution. The matrix materials were spiked using the activated carbon, and homogenized mechanically or by suspension in C2H5OH. Experimentally determined efficiency curves were compared with those obtained by Monte Carlo simulation. (C) 2008 Elsevier Ltd. All rights reserved.",
journal = "Applied Radiation and Isotopes",
title = "Experimental determination of the HPGe spectrometer efficiency curve",
volume = "66",
number = "6-7",
pages = "792-795",
doi = "10.1016/j.apradiso.2008.02.039"
}

Vukanac, I., Đurašević, M. M., Kandić, A., Novković, D. N., Nađđerđ, L.,& Milošević, Z.. (2008). Experimental determination of the HPGe spectrometer efficiency curve. in Applied Radiation and Isotopes, 66(6-7), 792-795.
https://doi.org/10.1016/j.apradiso.2008.02.039

Vukanac I, Đurašević MM, Kandić A, Novković DN, Nađđerđ L, Milošević Z. Experimental determination of the HPGe spectrometer efficiency curve. in Applied Radiation and Isotopes. 2008;66(6-7):792-795.
doi:10.1016/j.apradiso.2008.02.039 .

Vukanac, Ivana, Đurašević, Mirjana M., Kandić, Aleksandar, Novković, Dušan N., Nađđerđ, Laslo, Milošević, Zoran, "Experimental determination of the HPGe spectrometer efficiency curve" in Applied Radiation and Isotopes, 66, no. 6-7 (2008):792-795,
https://doi.org/10.1016/j.apradiso.2008.02.039 . .