TY  - CONF
AU  - Jovančević, Nikola
AU  - Knežević, David
AU  - Krmar, Miodrag
AU  - Nikolov, Jovana
AU  - Todorović, Nataša
AU  - Petrović, Jovana S.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8329
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  - Određivanje prisustva neutrona tokom niskofonskih gama spektrometrijskih merenja je
od posebne važnosti. Zbog toga je u ovom radu analiziran način određivanja
energetskog spektra neutrona prisutnog u merenjima sa HPGe detektorima. Ovaj metod
se zasniva na korišćenju metoda dekonvolucije. Za to je neophodno poznavati gama
aktivnost indukovanu neutronskim reakcijama sa različitim izotopima germanijuma kao
i efikasne preseke za date neutronske reakcije. Ovaj pristup je testiran merenjima sa
fisionim izvorom neutrona 252Cf koji je bio postavljen u blizini HPGe detektora.
Dobijeni rezultati pokazuju da ovaj metod moze pružiti pouzdane podatke o obliku
energetskog spektra neutrona tokom gama spektrometrijskih merenja.
AB  - Determination of neutron spectra in the Ge-detector during low-level gamma
spectroscopy measurements is of great importance. Thus, in this paper we analyzed the
method for the determination of neutron energy spectra present during measurements
with HPGe detectors. This method is based on using the deconvolution procedure. It
requires the knowledge of neutron induced gamma activities of Ge isotopes and the
cross section data for the neutron reactions of interest. This approach was tested with
measurements that used the fission neutron source 252Cf placed in proximity of the
HPGe detector. Results show that this method can provide reliable data about the shape
of neutron energy spectrum during gamma spectroscopy measurements.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Određivanje energetskog spektra neutrona prisutnog u gama spektrometrijskim merenjima sa germanijumskim detektorima
T1  - Determination of neutron energy spectra presence in gamma spectroscopic measurements using Ge-detectors
SP  - 558
EP  - 563
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8329
ER  - 

@conference{
author = "Jovančević, Nikola and Knežević, David and Krmar, Miodrag and Nikolov, Jovana and Todorović, Nataša and Petrović, Jovana S.",
year = "2017",
abstract = "Određivanje prisustva neutrona tokom niskofonskih gama spektrometrijskih merenja je
od posebne važnosti. Zbog toga je u ovom radu analiziran način određivanja
energetskog spektra neutrona prisutnog u merenjima sa HPGe detektorima. Ovaj metod
se zasniva na korišćenju metoda dekonvolucije. Za to je neophodno poznavati gama
aktivnost indukovanu neutronskim reakcijama sa različitim izotopima germanijuma kao
i efikasne preseke za date neutronske reakcije. Ovaj pristup je testiran merenjima sa
fisionim izvorom neutrona 252Cf koji je bio postavljen u blizini HPGe detektora.
Dobijeni rezultati pokazuju da ovaj metod moze pružiti pouzdane podatke o obliku
energetskog spektra neutrona tokom gama spektrometrijskih merenja., Determination of neutron spectra in the Ge-detector during low-level gamma
spectroscopy measurements is of great importance. Thus, in this paper we analyzed the
method for the determination of neutron energy spectra present during measurements
with HPGe detectors. This method is based on using the deconvolution procedure. It
requires the knowledge of neutron induced gamma activities of Ge isotopes and the
cross section data for the neutron reactions of interest. This approach was tested with
measurements that used the fission neutron source 252Cf placed in proximity of the
HPGe detector. Results show that this method can provide reliable data about the shape
of neutron energy spectrum during gamma spectroscopy measurements.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Određivanje energetskog spektra neutrona prisutnog u gama spektrometrijskim merenjima sa germanijumskim detektorima, Determination of neutron energy spectra presence in gamma spectroscopic measurements using Ge-detectors",
pages = "558-563",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8329"
}

Jovančević, N., Knežević, D., Krmar, M., Nikolov, J., Todorović, N.,& Petrović, J. S.. (2017). Određivanje energetskog spektra neutrona prisutnog u gama spektrometrijskim merenjima sa germanijumskim detektorima. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 558-563.
https://hdl.handle.net/21.15107/rcub_vinar_8329

Jovančević N, Knežević D, Krmar M, Nikolov J, Todorović N, Petrović JS. Određivanje energetskog spektra neutrona prisutnog u gama spektrometrijskim merenjima sa germanijumskim detektorima. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:558-563.
https://hdl.handle.net/21.15107/rcub_vinar_8329 .

Jovančević, Nikola, Knežević, David, Krmar, Miodrag, Nikolov, Jovana, Todorović, Nataša, Petrović, Jovana S., "Određivanje energetskog spektra neutrona prisutnog u gama spektrometrijskim merenjima sa germanijumskim detektorima" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):558-563,
https://hdl.handle.net/21.15107/rcub_vinar_8329 .

TY  - JOUR
AU  - Todorović, Nataša
AU  - Bikit, Ištvan S.
AU  - Krmar, Miodrag
AU  - Mrda, Dusan
AU  - Hansman, Jan
AU  - Nikolov, Jovana
AU  - Todorović, Slavko
AU  - Forkapic, Sofija
AU  - Jovancevic, Nikola
AU  - Bikit, Kristina
AU  - Janković Mandić, Ljiljana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1916
AB  - The estimation of the radioactivity levels of materials utilized in construction sectors is crucial in the assessment of possible radiological hazards to human health. In the paper, the results of gamma spectroscopy study of 211 zircon, 425 sand, 781 lime, 348 perlite, 2692 cement, 232 calplex, 968 gypsum, 2741 granite and 21 coal fly ash samples gathered from different countries and imported in Serbia in period 2006-2016 were presented. In order to assess the radiological impact from the investigated samples, the activity concentration index I-RP112 for all samples was ascertained. This research yields insight into the radioactive content in a variety of building materials of different origin. The obtained results were discussed on the basis of relevant national and international legislation and guidance and compared with the corresponding results in the literature.
T2  - Romanian Journal of Physics
T1  - Assessment of Radiological Significance of Building Materials and Residues
VL  - 62
IS  - 9-10
SP  - 817
UR  - https://hdl.handle.net/21.15107/rcub_vinar_1916
ER  - 

@article{
author = "Todorović, Nataša and Bikit, Ištvan S. and Krmar, Miodrag and Mrda, Dusan and Hansman, Jan and Nikolov, Jovana and Todorović, Slavko and Forkapic, Sofija and Jovancevic, Nikola and Bikit, Kristina and Janković Mandić, Ljiljana",
year = "2017",
abstract = "The estimation of the radioactivity levels of materials utilized in construction sectors is crucial in the assessment of possible radiological hazards to human health. In the paper, the results of gamma spectroscopy study of 211 zircon, 425 sand, 781 lime, 348 perlite, 2692 cement, 232 calplex, 968 gypsum, 2741 granite and 21 coal fly ash samples gathered from different countries and imported in Serbia in period 2006-2016 were presented. In order to assess the radiological impact from the investigated samples, the activity concentration index I-RP112 for all samples was ascertained. This research yields insight into the radioactive content in a variety of building materials of different origin. The obtained results were discussed on the basis of relevant national and international legislation and guidance and compared with the corresponding results in the literature.",
journal = "Romanian Journal of Physics",
title = "Assessment of Radiological Significance of Building Materials and Residues",
volume = "62",
number = "9-10",
pages = "817",
url = "https://hdl.handle.net/21.15107/rcub_vinar_1916"
}

Todorović, N., Bikit, I. S., Krmar, M., Mrda, D., Hansman, J., Nikolov, J., Todorović, S., Forkapic, S., Jovancevic, N., Bikit, K.,& Janković Mandić, L.. (2017). Assessment of Radiological Significance of Building Materials and Residues. in Romanian Journal of Physics, 62(9-10), 817.
https://hdl.handle.net/21.15107/rcub_vinar_1916

Todorović N, Bikit IS, Krmar M, Mrda D, Hansman J, Nikolov J, Todorović S, Forkapic S, Jovancevic N, Bikit K, Janković Mandić L. Assessment of Radiological Significance of Building Materials and Residues. in Romanian Journal of Physics. 2017;62(9-10):817.
https://hdl.handle.net/21.15107/rcub_vinar_1916 .

Todorović, Nataša, Bikit, Ištvan S., Krmar, Miodrag, Mrda, Dusan, Hansman, Jan, Nikolov, Jovana, Todorović, Slavko, Forkapic, Sofija, Jovancevic, Nikola, Bikit, Kristina, Janković Mandić, Ljiljana, "Assessment of Radiological Significance of Building Materials and Residues" in Romanian Journal of Physics, 62, no. 9-10 (2017):817,
https://hdl.handle.net/21.15107/rcub_vinar_1916 .

TY  - CONF
AU  - Barešić, Jadranka
AU  - Nikolov, Jovana
AU  - Todorović, Nataša
AU  - Krajcar Bronić, Ines
AU  - Stojković, Ivana
AU  - Tenjović, Branislava
AU  - Krmpotić, Matea
AU  - Tomić, Milan
AU  - Marić, Dragana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8325
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  - A method of direct measurement of 14C activity concentration via liquid scintillation
counting (LSC) is recognized as good and fast method for determination of biogenic
component in liquid fuels. Two laboratories that used this14C technique participated in
this survey: Laboratory from University of Novi Sad (UNS), Serbia and Laboratory
from Ruđer Bošković Institute (RBI), Croatia. Each laboratory used its own calibration
methods on the same set of samples (produced diesel-based bio-fuels and commercially
available domestic oils).
From the obtained results it can be concluded that each method which uses 14C
technique for determination of biogenic component in liquid fuels has its advantages
and disadvantages. RBI data evaluation method is based on two calibration curves, for
purely biogenic and purely fossil liquids, and the calibration does not depend on the
exact chemical composition of the organic liquid. The limits of the method are defined
by the SQP(E) of approximately 690. Below this value the count rates of biogenic and
fossil liquids become close to each other or even indistinguishable from one another
and the obtained results for biogenic fractions are not reliable. In this intercomparison
UNS used two different methods, one for produced bio-diesels and the other one for
domestic oils. UNS data evaluation method is very dependent on the composition of the
examined fuels, so the obtained results with the "two-step" method were relatively good
in the case of diesel mixtures with biogenic component. In the case of biogenic oil
samples (bought on market), UNS "two-step" method did not give realistic results, and
with the "one-step" method the limitation is large quenching in the samples, so for the
samples with SQP(E) less than 700 this method could not give expected results. Samples
prepared with liquid fuels are usually colored and the main challenge for determination
of biogenic component in both laboratories is handling of highly quenched liquids.
AB  - Prema preporukama Evropske Unije sa ciljem da se koriste obnovljivi i održivi izvori,
do 2020. godine zahteva se da se u svim tečnim gorivima koja se koriste nalazi bar 10%
sintetisanog biodizela. Da bi se koncentracija biodizela mogla proveriti, nekoliko
laboratorija u svetu je razvilo metode za tačnu, efikasnu i pouzdanu kvantifikaciju
sadržaja biogene komponente. Direktno merenje koncentracije aktivnosti 14C tečnim
scintilacionim detektorom (LSC), koje podrazumeva određivanje količine 14C u uzorku
kao meru prisutnosti biogene komponente u testiranom gorivu, pokazalo se kao dobra i
brza metoda. U ovoj interkomparaciji učestvovale su dve laboratorije: Laboratorija sa
Univerziteta u Novom Sadu (UNS), Srbija i Laboratorija sa Instituta Ruđer Bošković
(RBI), Hrvatska. Svaka laboratorija je koristila sopstveni kalibracioni metod i isti set
uzoraka za interkomparaciju (proizvedena bio-goriva bazirana na dizelu i komercijalno
dostupna domaća ulja).
Iz dobijenih rezultata može se zaključiti da svaki od prikazanih metoda ima svoje
prednosti i mane, što zavisi od samog sastava uzorka. RBI metod se zasniva na upotrebi
dve kalibracione krive, za čisto biogena i čisto fosilna goriva, i kalibracija nije zavisna
od hemijskog sastava analiziranog uzorka. Ograničenje ove metode je SQP(E) vrednost
niža od 690. Ispod ove vrednosti odbroji biogene i fosilne komponente postaju veoma
bliski jedan drugom i samim tim rezultati koji se dobijaju nisu pouzdani. U ovoj
interkomparaciji, UNS je koristila dve različite metode kalibracije, jednu za
proizvedene bio-dizele, a drugu za domaća ulja. UNS metod evaluacije izmerenih
podataka u mnogome zavisi od sastava ispitivanog goriva, pa su rezultati dobijeni sa
"two-step" metodom relativno dobri za smeše dizela sa biogenom komponentom. U
slučaju biogenih ulja, UNS "two-step" metod nije dao realistične rezultate, zbog toga je
korišćen "one-step" metoda za koji je utvrđeno ograničenje za SQP(E) parametar na
700.
Uzorci koji se pripremaju sa tečnim gorivima su najčešće obojeni i najveći problem koji
se javlja je korekcija na prigušenje u samom uzorku, koja mora biti detaljno sprovedena
kako bi se dobio pouzdan rezultat, pa najveći izazov daljnjeg razvoja ovih metoda
postaje postupak merenja biogene komponente u jako prigušenim uzorcima.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Comparison of methods for determination of biogenic fraction in liquid fuels
T1  - Poređenje metoda za određivanje biogene komponente u tečnim gorivima
SP  - 529
EP  - 536
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8325
ER  - 

@conference{
author = "Barešić, Jadranka and Nikolov, Jovana and Todorović, Nataša and Krajcar Bronić, Ines and Stojković, Ivana and Tenjović, Branislava and Krmpotić, Matea and Tomić, Milan and Marić, Dragana",
year = "2017",
abstract = "A method of direct measurement of 14C activity concentration via liquid scintillation
counting (LSC) is recognized as good and fast method for determination of biogenic
component in liquid fuels. Two laboratories that used this14C technique participated in
this survey: Laboratory from University of Novi Sad (UNS), Serbia and Laboratory
from Ruđer Bošković Institute (RBI), Croatia. Each laboratory used its own calibration
methods on the same set of samples (produced diesel-based bio-fuels and commercially
available domestic oils).
From the obtained results it can be concluded that each method which uses 14C
technique for determination of biogenic component in liquid fuels has its advantages
and disadvantages. RBI data evaluation method is based on two calibration curves, for
purely biogenic and purely fossil liquids, and the calibration does not depend on the
exact chemical composition of the organic liquid. The limits of the method are defined
by the SQP(E) of approximately 690. Below this value the count rates of biogenic and
fossil liquids become close to each other or even indistinguishable from one another
and the obtained results for biogenic fractions are not reliable. In this intercomparison
UNS used two different methods, one for produced bio-diesels and the other one for
domestic oils. UNS data evaluation method is very dependent on the composition of the
examined fuels, so the obtained results with the "two-step" method were relatively good
in the case of diesel mixtures with biogenic component. In the case of biogenic oil
samples (bought on market), UNS "two-step" method did not give realistic results, and
with the "one-step" method the limitation is large quenching in the samples, so for the
samples with SQP(E) less than 700 this method could not give expected results. Samples
prepared with liquid fuels are usually colored and the main challenge for determination
of biogenic component in both laboratories is handling of highly quenched liquids., Prema preporukama Evropske Unije sa ciljem da se koriste obnovljivi i održivi izvori,
do 2020. godine zahteva se da se u svim tečnim gorivima koja se koriste nalazi bar 10%
sintetisanog biodizela. Da bi se koncentracija biodizela mogla proveriti, nekoliko
laboratorija u svetu je razvilo metode za tačnu, efikasnu i pouzdanu kvantifikaciju
sadržaja biogene komponente. Direktno merenje koncentracije aktivnosti 14C tečnim
scintilacionim detektorom (LSC), koje podrazumeva određivanje količine 14C u uzorku
kao meru prisutnosti biogene komponente u testiranom gorivu, pokazalo se kao dobra i
brza metoda. U ovoj interkomparaciji učestvovale su dve laboratorije: Laboratorija sa
Univerziteta u Novom Sadu (UNS), Srbija i Laboratorija sa Instituta Ruđer Bošković
(RBI), Hrvatska. Svaka laboratorija je koristila sopstveni kalibracioni metod i isti set
uzoraka za interkomparaciju (proizvedena bio-goriva bazirana na dizelu i komercijalno
dostupna domaća ulja).
Iz dobijenih rezultata može se zaključiti da svaki od prikazanih metoda ima svoje
prednosti i mane, što zavisi od samog sastava uzorka. RBI metod se zasniva na upotrebi
dve kalibracione krive, za čisto biogena i čisto fosilna goriva, i kalibracija nije zavisna
od hemijskog sastava analiziranog uzorka. Ograničenje ove metode je SQP(E) vrednost
niža od 690. Ispod ove vrednosti odbroji biogene i fosilne komponente postaju veoma
bliski jedan drugom i samim tim rezultati koji se dobijaju nisu pouzdani. U ovoj
interkomparaciji, UNS je koristila dve različite metode kalibracije, jednu za
proizvedene bio-dizele, a drugu za domaća ulja. UNS metod evaluacije izmerenih
podataka u mnogome zavisi od sastava ispitivanog goriva, pa su rezultati dobijeni sa
"two-step" metodom relativno dobri za smeše dizela sa biogenom komponentom. U
slučaju biogenih ulja, UNS "two-step" metod nije dao realistične rezultate, zbog toga je
korišćen "one-step" metoda za koji je utvrđeno ograničenje za SQP(E) parametar na
700.
Uzorci koji se pripremaju sa tečnim gorivima su najčešće obojeni i najveći problem koji
se javlja je korekcija na prigušenje u samom uzorku, koja mora biti detaljno sprovedena
kako bi se dobio pouzdan rezultat, pa najveći izazov daljnjeg razvoja ovih metoda
postaje postupak merenja biogene komponente u jako prigušenim uzorcima.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Comparison of methods for determination of biogenic fraction in liquid fuels, Poređenje metoda za određivanje biogene komponente u tečnim gorivima",
pages = "529-536",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8325"
}

Barešić, J., Nikolov, J., Todorović, N., Krajcar Bronić, I., Stojković, I., Tenjović, B., Krmpotić, M., Tomić, M.,& Marić, D.. (2017). Comparison of methods for determination of biogenic fraction in liquid fuels. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 529-536.
https://hdl.handle.net/21.15107/rcub_vinar_8325

Barešić J, Nikolov J, Todorović N, Krajcar Bronić I, Stojković I, Tenjović B, Krmpotić M, Tomić M, Marić D. Comparison of methods for determination of biogenic fraction in liquid fuels. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:529-536.
https://hdl.handle.net/21.15107/rcub_vinar_8325 .

Barešić, Jadranka, Nikolov, Jovana, Todorović, Nataša, Krajcar Bronić, Ines, Stojković, Ivana, Tenjović, Branislava, Krmpotić, Matea, Tomić, Milan, Marić, Dragana, "Comparison of methods for determination of biogenic fraction in liquid fuels" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):529-536,
https://hdl.handle.net/21.15107/rcub_vinar_8325 .

TY  - CONF
AU  - Jovančević, Nikola
AU  - Knežević, David
AU  - Krmar, Miodrag
AU  - Nikolov, Jovana
AU  - Todorović, Nataša
AU  - Ilić, Strahinja
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8328
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  - Mioni predstavljaju glavnu komponentu kosmičkog zračenja na nivou mora, zbog čega
su značajan izvor fonske aktivnosti u gama spektrometrijskim merenjima. Fonsku
aktivnost mioni mogu produkovati interakcijama sa detektorom i okolnim materijalima.
Tom prilikom nastali neutroni daju takođe značajan doprinos vrednosti fonske gama
aktivnosti. U ovom radu su predstavljeni rezultati merenja korišćenjem HPGe detektora
sa gvozdenom i olovnom pasivnom zaštitom u dva okruženja, kada je iznad detektora
bila prisutna različita debljina pokrovnog betonskog sloja. Monitoring prisustva miona
je vršen korišćenjem plastičnog scintilacionog detektora. Određene su vrednosti
inteziteta gama pikova koji se javljaju usled neutronskih reakcija i upoređeni su sa
promenom prisustva miona u okruženju detektora. Dobijeni rezultati mogu poslužiti za
unapređenje projektovanja zaštita prilikom niskofonskih gama spektrometrijskih
merenja.
AB  - Muons are one of the main components of cosmic radiation on the sea level and there
are significant source background activities during gamma spectroscopic measurements. Background activity can be produced by muon interactions with detector and
surrounding materials. On this way created neutrons also have high influence on
detection of background events. In this work there are presented the results of
measurements by use of HPGe detectors with iron and lead shields. The detectors were
located in two different environments where the different thicknesses of covering
concrete layer were present. The monitoring of muons presence was done by
measurements with plastic scintillation detector. The levels of neutron induced gamma
activates were determinated and compared with changing of muon flux in detectors
environment. The results can be used for improving of new detector shield in gamma
spectrometry measurements.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Uticaj promena mionskog fluksa na nivo fonske aktivnosti u niskofonskim gama spektrometrijskim merenjima
T1  - Influence of muon flux variations to level of background activity during low-background gamma spectrometric measurements
SP  - 551
EP  - 557
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8328
ER  - 

@conference{
author = "Jovančević, Nikola and Knežević, David and Krmar, Miodrag and Nikolov, Jovana and Todorović, Nataša and Ilić, Strahinja",
year = "2017",
abstract = "Mioni predstavljaju glavnu komponentu kosmičkog zračenja na nivou mora, zbog čega
su značajan izvor fonske aktivnosti u gama spektrometrijskim merenjima. Fonsku
aktivnost mioni mogu produkovati interakcijama sa detektorom i okolnim materijalima.
Tom prilikom nastali neutroni daju takođe značajan doprinos vrednosti fonske gama
aktivnosti. U ovom radu su predstavljeni rezultati merenja korišćenjem HPGe detektora
sa gvozdenom i olovnom pasivnom zaštitom u dva okruženja, kada je iznad detektora
bila prisutna različita debljina pokrovnog betonskog sloja. Monitoring prisustva miona
je vršen korišćenjem plastičnog scintilacionog detektora. Određene su vrednosti
inteziteta gama pikova koji se javljaju usled neutronskih reakcija i upoređeni su sa
promenom prisustva miona u okruženju detektora. Dobijeni rezultati mogu poslužiti za
unapređenje projektovanja zaštita prilikom niskofonskih gama spektrometrijskih
merenja., Muons are one of the main components of cosmic radiation on the sea level and there
are significant source background activities during gamma spectroscopic measurements. Background activity can be produced by muon interactions with detector and
surrounding materials. On this way created neutrons also have high influence on
detection of background events. In this work there are presented the results of
measurements by use of HPGe detectors with iron and lead shields. The detectors were
located in two different environments where the different thicknesses of covering
concrete layer were present. The monitoring of muons presence was done by
measurements with plastic scintillation detector. The levels of neutron induced gamma
activates were determinated and compared with changing of muon flux in detectors
environment. The results can be used for improving of new detector shield in gamma
spectrometry measurements.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Uticaj promena mionskog fluksa na nivo fonske aktivnosti u niskofonskim gama spektrometrijskim merenjima, Influence of muon flux variations to level of background activity during low-background gamma spectrometric measurements",
pages = "551-557",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8328"
}

Jovančević, N., Knežević, D., Krmar, M., Nikolov, J., Todorović, N.,& Ilić, S.. (2017). Uticaj promena mionskog fluksa na nivo fonske aktivnosti u niskofonskim gama spektrometrijskim merenjima. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 551-557.
https://hdl.handle.net/21.15107/rcub_vinar_8328

Jovančević N, Knežević D, Krmar M, Nikolov J, Todorović N, Ilić S. Uticaj promena mionskog fluksa na nivo fonske aktivnosti u niskofonskim gama spektrometrijskim merenjima. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:551-557.
https://hdl.handle.net/21.15107/rcub_vinar_8328 .

Jovančević, Nikola, Knežević, David, Krmar, Miodrag, Nikolov, Jovana, Todorović, Nataša, Ilić, Strahinja, "Uticaj promena mionskog fluksa na nivo fonske aktivnosti u niskofonskim gama spektrometrijskim merenjima" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):551-557,
https://hdl.handle.net/21.15107/rcub_vinar_8328 .

TY  - CONF
AU  - Vraničar, Andrej
AU  - Todorović, Nataša
AU  - Nikolov, Jovana
AU  - Tenjović, Branislava
AU  - Stojković, Ivana
AU  - Jovančević, Nikola
AU  - Hansman, Jan
AU  - Krmar, Miodrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8320
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  - Zbog svoje visoke efikasnosti, NaI detektor oblika jame je odličan izbor za detekciju
niskih aktivnosti, pogotovo kod uzoraka uzetih iz prirode. No velik prostorni ugao kojeg
aktivna zapremina detektora oblika jame zauzima, neminovno dovodi do efekta
koincidentnog sumiranja. Na osnovu većeg broja gama spektara rastvora radijuma je
ispitan uticaj koincidentnog sumiranja na efikasnost detekcije u cilju razvijanja brzog i
pouzdanog metoda za merenje radijuma u pijaćim vodama. Razvijen je i nov “grafički”
metod za određivanje praga detekcije koji je ispitan na primeru voluminoznih uzoraka
male aktivnosti.
AB  - Due to its high efficiency, a well-type NaI detector is an excellent choice for low-level
activity detection, especially for samples taken from nature. But, the large space angle
that active volume of the detector includes, indispicably leads to coincident summing.
Based on large number of gamma spectra of radium solutions, the effect of coincident
summing was examined for purposes of developing a fast and reliable method for
drinking water radium measurements. Also, a new ”graphical”method for determining
MDA, based on measurements of small activity voluminous samples was developed.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Radijum u vodi: detekcija voluminoznih uzoraka NaI detektorom oblika jame
T1  - Radium in water: detection of bulk samples in well-type NaI detector
SP  - 493
EP  - 499
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8320
ER  - 

@conference{
author = "Vraničar, Andrej and Todorović, Nataša and Nikolov, Jovana and Tenjović, Branislava and Stojković, Ivana and Jovančević, Nikola and Hansman, Jan and Krmar, Miodrag",
year = "2017",
abstract = "Zbog svoje visoke efikasnosti, NaI detektor oblika jame je odličan izbor za detekciju
niskih aktivnosti, pogotovo kod uzoraka uzetih iz prirode. No velik prostorni ugao kojeg
aktivna zapremina detektora oblika jame zauzima, neminovno dovodi do efekta
koincidentnog sumiranja. Na osnovu većeg broja gama spektara rastvora radijuma je
ispitan uticaj koincidentnog sumiranja na efikasnost detekcije u cilju razvijanja brzog i
pouzdanog metoda za merenje radijuma u pijaćim vodama. Razvijen je i nov “grafički”
metod za određivanje praga detekcije koji je ispitan na primeru voluminoznih uzoraka
male aktivnosti., Due to its high efficiency, a well-type NaI detector is an excellent choice for low-level
activity detection, especially for samples taken from nature. But, the large space angle
that active volume of the detector includes, indispicably leads to coincident summing.
Based on large number of gamma spectra of radium solutions, the effect of coincident
summing was examined for purposes of developing a fast and reliable method for
drinking water radium measurements. Also, a new ”graphical”method for determining
MDA, based on measurements of small activity voluminous samples was developed.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Radijum u vodi: detekcija voluminoznih uzoraka NaI detektorom oblika jame, Radium in water: detection of bulk samples in well-type NaI detector",
pages = "493-499",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8320"
}

Vraničar, A., Todorović, N., Nikolov, J., Tenjović, B., Stojković, I., Jovančević, N., Hansman, J.,& Krmar, M.. (2017). Radijum u vodi: detekcija voluminoznih uzoraka NaI detektorom oblika jame. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 493-499.
https://hdl.handle.net/21.15107/rcub_vinar_8320

Vraničar A, Todorović N, Nikolov J, Tenjović B, Stojković I, Jovančević N, Hansman J, Krmar M. Radijum u vodi: detekcija voluminoznih uzoraka NaI detektorom oblika jame. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:493-499.
https://hdl.handle.net/21.15107/rcub_vinar_8320 .

Vraničar, Andrej, Todorović, Nataša, Nikolov, Jovana, Tenjović, Branislava, Stojković, Ivana, Jovančević, Nikola, Hansman, Jan, Krmar, Miodrag, "Radijum u vodi: detekcija voluminoznih uzoraka NaI detektorom oblika jame" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):493-499,
https://hdl.handle.net/21.15107/rcub_vinar_8320 .

TY  - CONF
AU  - Todorović, Nataša
AU  - Nikolov, Jovana
AU  - Stojković, Ivana
AU  - Hansman, Jan
AU  - Kuzmanović, Predrag
AU  - Vraničar, Andrej
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8319
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  - U radu je prikazano poređenje različitih metoda i tehnika za određivanje 226Ra u vodi:
tečna scinitlaciona spektrometrija (LSC), alfa spektrometrija i gama spektrometrija.
Tehnikom LSC određen je sadržaj 226Ra u vodi korišćenjem sledećih metoda:
standardne test metode ASTM D 7283-06 i EPA metode 913.0. Gama spektrometrijom
je sadržaj 226Ra određen direktnom metodom u Marineli geometriji. Alfa spektrometrom
RAD 7 određena je koncentracija aktivnosti 226Ra u vodi korišćenjem protokola
Wat250. Izvršeno je poređene rezultata dobijenih ovim metodama i dat je pregled
prednosti i nedostataka svake metode i tehnike. Dobijene eksperimentalne vrednosti za
sve metode su date sa odgovarajućim korekcijom.
AB  - The measurement of 226Ra in natural water samples is important because it is one of the
most hazardous elements with respect to internal radiation exposure. Therefore, in the
monitoring studies it is desirable to have a precise and accurate technique for the
determination of the activity concentration of this radionuclide.
This paper presents a comparison of different techniques and methods for 226
Ra in
water samples spiked with different concentrations of 226Ra isotope: LSC (Liquid
Scintillation Counting), alpha and gamma spectrometry. An overview of the advantages
and disadvantages of each techniques are presented. 226Ra in water samples were
determined by gamma spectrometry using direct method (untreated water samples) and
by RAD7 solid state detector. For 226Ra determination by LSC two different methods
were tested: ASTM D 7283-06 Standard test method for alpha and beta activity in water
by liquid scintillation and EPA Method 913.0 for radon determination in drinking
water.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Poređenje metoda za ispitivanje Ra226 u vodi
T1  - Different techniques for Ra226 determination in water samples
SP  - 482
EP  - 492
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8319
ER  - 

@conference{
author = "Todorović, Nataša and Nikolov, Jovana and Stojković, Ivana and Hansman, Jan and Kuzmanović, Predrag and Vraničar, Andrej",
year = "2017",
abstract = "U radu je prikazano poređenje različitih metoda i tehnika za određivanje 226Ra u vodi:
tečna scinitlaciona spektrometrija (LSC), alfa spektrometrija i gama spektrometrija.
Tehnikom LSC određen je sadržaj 226Ra u vodi korišćenjem sledećih metoda:
standardne test metode ASTM D 7283-06 i EPA metode 913.0. Gama spektrometrijom
je sadržaj 226Ra određen direktnom metodom u Marineli geometriji. Alfa spektrometrom
RAD 7 određena je koncentracija aktivnosti 226Ra u vodi korišćenjem protokola
Wat250. Izvršeno je poređene rezultata dobijenih ovim metodama i dat je pregled
prednosti i nedostataka svake metode i tehnike. Dobijene eksperimentalne vrednosti za
sve metode su date sa odgovarajućim korekcijom., The measurement of 226Ra in natural water samples is important because it is one of the
most hazardous elements with respect to internal radiation exposure. Therefore, in the
monitoring studies it is desirable to have a precise and accurate technique for the
determination of the activity concentration of this radionuclide.
This paper presents a comparison of different techniques and methods for 226
Ra in
water samples spiked with different concentrations of 226Ra isotope: LSC (Liquid
Scintillation Counting), alpha and gamma spectrometry. An overview of the advantages
and disadvantages of each techniques are presented. 226Ra in water samples were
determined by gamma spectrometry using direct method (untreated water samples) and
by RAD7 solid state detector. For 226Ra determination by LSC two different methods
were tested: ASTM D 7283-06 Standard test method for alpha and beta activity in water
by liquid scintillation and EPA Method 913.0 for radon determination in drinking
water.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Poređenje metoda za ispitivanje Ra226 u vodi, Different techniques for Ra226 determination in water samples",
pages = "482-492",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8319"
}

Todorović, N., Nikolov, J., Stojković, I., Hansman, J., Kuzmanović, P.,& Vraničar, A.. (2017). Poređenje metoda za ispitivanje Ra226 u vodi. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 482-492.
https://hdl.handle.net/21.15107/rcub_vinar_8319

Todorović N, Nikolov J, Stojković I, Hansman J, Kuzmanović P, Vraničar A. Poređenje metoda za ispitivanje Ra226 u vodi. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:482-492.
https://hdl.handle.net/21.15107/rcub_vinar_8319 .

Todorović, Nataša, Nikolov, Jovana, Stojković, Ivana, Hansman, Jan, Kuzmanović, Predrag, Vraničar, Andrej, "Poređenje metoda za ispitivanje Ra226 u vodi" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):482-492,
https://hdl.handle.net/21.15107/rcub_vinar_8319 .

TY  - CONF
AU  - Stojković, Ivana
AU  - Todorović, Nataša
AU  - Nikolov, Jovana
AU  - Tenjović, Branislava
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8326
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  - Monitoring of environmental samples, drinking and surface waters, is continuously
carried out, demanding development of methods that are both reliable and accurate on
one side, but as simple and fast as possible, on the other. Screening tests such as gross
alpha/beta activity measurements in water samples are one liquid scintillation counting
(LSC) technique widely used as an efficient tool for radiological assesment and
estimation whether water sample needs further analysis or not. In this paper,
establishment of rapid gross alpha/beta screening technique in waters has been
presented, which assumes modification of conventional ASTM D 7283-06 method, since
samples were directly mixed with liquid scintillation cocktail, without any sample
pretreatment. Method’s optimization involved sample-to-cocktail ratio determination
based on the achieved detection limit and sample’s quench level. Optimal value of Pulse
Shape Analysis (PSA) discriminator that considerably improves performance of LSC
technique through alpha/beta spectra separation during radiological quality
measurements of drinking waters has also been investigated. Results of calibration
experiments and method’s validity measurements on spiked samples with 241Am and
90Sr/90Y aqueous standards are presented. Achieved detection limits for 300 minutes
of counting are MDAα=0.294(11) Bq l-1 and MDAβ=0.405(5) Bq l-1, in alpha and beta
window, respectively. Direct alpha/beta method provides deviations up to 40% from
reference values, but it offers advantages over conventional alpha/beta measurements,
it is ultra fast, simple and inexpensive test for efficient screening of water samples.
AB  - Rutinski monitoring pijaćih i površinskih voda sprovodi se kontinuirano i nameće
potrebu za razvojem metoda koje su, s jedne strane, pouzdane i tačne, ali istovremeno,
jednostavne i brze. Screening testovi radi procene ukupne alfa/beta aktivnosti u
uzorcima voda, jedna su od često primenjenih tehnika tečne scintilacione
spektroskopije, kojima se efikasno može utvrditi da li uzorak zahteva dalju radiološku
analizu ili ne. U radu je predstavljena optimizacija brze direktne metode za ispitivanje
ukupne alfa/beta aktivnosti u vodama, uz prikaz i diskusiju postignutih granica
detekcije. Ova metoda je modifikacija standardne test metode ASTM D 7283-06 za
ispitivanje ukupne alfa i beta aktivnosti i podrazumeva direktno mešanje uzorka vode sa
scintilacionim koktelom. Na taj način, uzorak je spreman za merenje bez prethodne
pripreme koja, prema standardnim metodama, obično podrazumeva duge procedure
poput uparavanja do suvog ostatka. Optimizacija metode sastoji se u određivanju
optimalnog odnosa uzorak: scintilacioni koktel na osnovu granica detekcije (MDA) u
alfa i beta kanalima, kao i nivoa prigušenja u uzorcima, uzimajući u obzir i maksimalni
kapacitet određenog koktela. Podešena je vrednost PSA (Pulse Shape Analysis)
diskriminatora u cilju optimalne separacije alfa i beta spektara i redukcije pozadinskih
efekata. Kalibracija i validacija metode je izvršena standardnim referentnim materijalima, rastvorima 241Am i 90Sr/90Y. Utvrđeno je da za 300 minuta merenja tečnim
scintilacionim brojačem, mogu se izmeriti koncentracije aktivnosti koje premašuju
vrednosti MDAα=0,294(11) Bq l-1 i MDAβ=0,405(5) Bq l-1 u alfa i beta kanalima,
respektivno. Rezultati validacije metode pokazuju da maksimalna relativna odstupanja
mogu iznositi do 40%, što je prihvatljivo, uzimajući u obzir da metod nije predviđen za
precizno merenje koncentracija aktivnosti pojedinih radionuklida, već za celokupnu
procenu radiološke bezbednosti uzoraka voda.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Rapid LSC method for direct alpha/beta measurements in waters
T1  - Direktna metoda za određivanje ukupne alfa/beta aktivnosti u vodama
SP  - 537
EP  - 543
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8326
ER  - 

@conference{
author = "Stojković, Ivana and Todorović, Nataša and Nikolov, Jovana and Tenjović, Branislava",
year = "2017",
abstract = "Monitoring of environmental samples, drinking and surface waters, is continuously
carried out, demanding development of methods that are both reliable and accurate on
one side, but as simple and fast as possible, on the other. Screening tests such as gross
alpha/beta activity measurements in water samples are one liquid scintillation counting
(LSC) technique widely used as an efficient tool for radiological assesment and
estimation whether water sample needs further analysis or not. In this paper,
establishment of rapid gross alpha/beta screening technique in waters has been
presented, which assumes modification of conventional ASTM D 7283-06 method, since
samples were directly mixed with liquid scintillation cocktail, without any sample
pretreatment. Method’s optimization involved sample-to-cocktail ratio determination
based on the achieved detection limit and sample’s quench level. Optimal value of Pulse
Shape Analysis (PSA) discriminator that considerably improves performance of LSC
technique through alpha/beta spectra separation during radiological quality
measurements of drinking waters has also been investigated. Results of calibration
experiments and method’s validity measurements on spiked samples with 241Am and
90Sr/90Y aqueous standards are presented. Achieved detection limits for 300 minutes
of counting are MDAα=0.294(11) Bq l-1 and MDAβ=0.405(5) Bq l-1, in alpha and beta
window, respectively. Direct alpha/beta method provides deviations up to 40% from
reference values, but it offers advantages over conventional alpha/beta measurements,
it is ultra fast, simple and inexpensive test for efficient screening of water samples., Rutinski monitoring pijaćih i površinskih voda sprovodi se kontinuirano i nameće
potrebu za razvojem metoda koje su, s jedne strane, pouzdane i tačne, ali istovremeno,
jednostavne i brze. Screening testovi radi procene ukupne alfa/beta aktivnosti u
uzorcima voda, jedna su od često primenjenih tehnika tečne scintilacione
spektroskopije, kojima se efikasno može utvrditi da li uzorak zahteva dalju radiološku
analizu ili ne. U radu je predstavljena optimizacija brze direktne metode za ispitivanje
ukupne alfa/beta aktivnosti u vodama, uz prikaz i diskusiju postignutih granica
detekcije. Ova metoda je modifikacija standardne test metode ASTM D 7283-06 za
ispitivanje ukupne alfa i beta aktivnosti i podrazumeva direktno mešanje uzorka vode sa
scintilacionim koktelom. Na taj način, uzorak je spreman za merenje bez prethodne
pripreme koja, prema standardnim metodama, obično podrazumeva duge procedure
poput uparavanja do suvog ostatka. Optimizacija metode sastoji se u određivanju
optimalnog odnosa uzorak: scintilacioni koktel na osnovu granica detekcije (MDA) u
alfa i beta kanalima, kao i nivoa prigušenja u uzorcima, uzimajući u obzir i maksimalni
kapacitet određenog koktela. Podešena je vrednost PSA (Pulse Shape Analysis)
diskriminatora u cilju optimalne separacije alfa i beta spektara i redukcije pozadinskih
efekata. Kalibracija i validacija metode je izvršena standardnim referentnim materijalima, rastvorima 241Am i 90Sr/90Y. Utvrđeno je da za 300 minuta merenja tečnim
scintilacionim brojačem, mogu se izmeriti koncentracije aktivnosti koje premašuju
vrednosti MDAα=0,294(11) Bq l-1 i MDAβ=0,405(5) Bq l-1 u alfa i beta kanalima,
respektivno. Rezultati validacije metode pokazuju da maksimalna relativna odstupanja
mogu iznositi do 40%, što je prihvatljivo, uzimajući u obzir da metod nije predviđen za
precizno merenje koncentracija aktivnosti pojedinih radionuklida, već za celokupnu
procenu radiološke bezbednosti uzoraka voda.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Rapid LSC method for direct alpha/beta measurements in waters, Direktna metoda za određivanje ukupne alfa/beta aktivnosti u vodama",
pages = "537-543",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8326"
}

Stojković, I., Todorović, N., Nikolov, J.,& Tenjović, B.. (2017). Rapid LSC method for direct alpha/beta measurements in waters. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 537-543.
https://hdl.handle.net/21.15107/rcub_vinar_8326

Stojković I, Todorović N, Nikolov J, Tenjović B. Rapid LSC method for direct alpha/beta measurements in waters. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:537-543.
https://hdl.handle.net/21.15107/rcub_vinar_8326 .

Stojković, Ivana, Todorović, Nataša, Nikolov, Jovana, Tenjović, Branislava, "Rapid LSC method for direct alpha/beta measurements in waters" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):537-543,
https://hdl.handle.net/21.15107/rcub_vinar_8326 .

TY  - CONF
AU  - Nikolov, Jovana
AU  - Todorović, Nataša
AU  - Stojković, Ivana
AU  - Tenjović, Branislava
AU  - Vraničar, Andrej
AU  - Knežević, Jovana
AU  - Vuković, Srđan
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8321
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  - Radon 222Rn nastaje kao produkt raspada 226Ra, rastvorljiv je u vodi i predstavlja jedan
od najzastupljenijih prirodnih izvora zračenja. Monitoring 222Rn u vodi za piće je važno
kontinuirano sprovoditi kako zbog hidrogeoloških studija tako i zbog procene
radiološkog rizika. Postoje različite metode merenja radona u vodi. Alfa
spektrometrijske metode su najzastupljenije, posebno se izdvaja RAD7 kao portabilni
alfa spektrometar koji omogućava merenja na terenu. Tečna scintilaciona
spektrometrija (LSC) se često preferira kao tehnika merenja 222Rn u uzorcima vode.
Sama metoda se sprovodi mešanjem uzoraka vode sa organskim scintilacionim
koktelom, koktel izaziva difuziju radona iz vodenog rastvora u organsku fazu jer radon
ima veći afinitet ka organskoj fazi, čime se sprečava emanacija radona iz vode. Pored
pomenutih metoda, i gama spektrometrijska metoda koja koristi sekularnu radioaktivnu
ravnotežu radona i njegovih potomaka daje zadovoljavajuće rezutlate. U ovom radu
biće prikazane prednosti i mane četiri različite metode merenja radona u vodi: dve LSC
metode (monofazna i dvofazna), RAD7 i gama spektrometrijska metoda. Pored
razčičitih tehnika merenja, u radu će biti prikazano i poređenje dve metode uzorkovanja
voda za analizu.
AB  - Radon 222Rn is formed as a product of decomposition of 226Ra, it is radioactive isotope
that is soluble in water and represents one of the most common natural sources of
radiation. Monitoring of 222Rn in drinking water is important to continuously implement
due to hydrogeological studies and also radiological risk assessment. There are
different methods of measuring radon in water. Alpha spectrometric methods are the
most commonly used, especially RAD7 as a portable alpha spectrometer that allows on
field measurements. Liquid scintillation spectrometry (LSC) is often preferred as a
technique of measuring 222Rn in water samples. The method itself is carried out by
mixing water samples with an organic scintillation cocktail. The cocktail causes the
radon diffusion from the aqueous solution to the organic phase because radon has a
higher affinity for the organic phase, thus preventing the emission of radon from the
water. In addition to the before mentioned methods, a gamma spectrometric method
that uses the secular radioactive equilibrium of radon and its daughter products gave us
satisfactory results. In this paper, the advantages and disadvantages of four different
methods of measuring radon in water will be shown: two LSC methods (monophase and
two-phase), RAD7 and gamma spectrometric method. All three methods have very low
minimal detectable activity (MDA) values, lower than 1 Bq l-1. In addition to the
different measurement techniques, a comparison of two methods for sampling of water
will be presented also on few examples.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Metode merenja Rn222 u vodi
T1  - Methods of Rn222 in water measurement
SP  - 500
EP  - 506
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8321
ER  - 

@conference{
author = "Nikolov, Jovana and Todorović, Nataša and Stojković, Ivana and Tenjović, Branislava and Vraničar, Andrej and Knežević, Jovana and Vuković, Srđan",
year = "2017",
abstract = "Radon 222Rn nastaje kao produkt raspada 226Ra, rastvorljiv je u vodi i predstavlja jedan
od najzastupljenijih prirodnih izvora zračenja. Monitoring 222Rn u vodi za piće je važno
kontinuirano sprovoditi kako zbog hidrogeoloških studija tako i zbog procene
radiološkog rizika. Postoje različite metode merenja radona u vodi. Alfa
spektrometrijske metode su najzastupljenije, posebno se izdvaja RAD7 kao portabilni
alfa spektrometar koji omogućava merenja na terenu. Tečna scintilaciona
spektrometrija (LSC) se često preferira kao tehnika merenja 222Rn u uzorcima vode.
Sama metoda se sprovodi mešanjem uzoraka vode sa organskim scintilacionim
koktelom, koktel izaziva difuziju radona iz vodenog rastvora u organsku fazu jer radon
ima veći afinitet ka organskoj fazi, čime se sprečava emanacija radona iz vode. Pored
pomenutih metoda, i gama spektrometrijska metoda koja koristi sekularnu radioaktivnu
ravnotežu radona i njegovih potomaka daje zadovoljavajuće rezutlate. U ovom radu
biće prikazane prednosti i mane četiri različite metode merenja radona u vodi: dve LSC
metode (monofazna i dvofazna), RAD7 i gama spektrometrijska metoda. Pored
razčičitih tehnika merenja, u radu će biti prikazano i poređenje dve metode uzorkovanja
voda za analizu., Radon 222Rn is formed as a product of decomposition of 226Ra, it is radioactive isotope
that is soluble in water and represents one of the most common natural sources of
radiation. Monitoring of 222Rn in drinking water is important to continuously implement
due to hydrogeological studies and also radiological risk assessment. There are
different methods of measuring radon in water. Alpha spectrometric methods are the
most commonly used, especially RAD7 as a portable alpha spectrometer that allows on
field measurements. Liquid scintillation spectrometry (LSC) is often preferred as a
technique of measuring 222Rn in water samples. The method itself is carried out by
mixing water samples with an organic scintillation cocktail. The cocktail causes the
radon diffusion from the aqueous solution to the organic phase because radon has a
higher affinity for the organic phase, thus preventing the emission of radon from the
water. In addition to the before mentioned methods, a gamma spectrometric method
that uses the secular radioactive equilibrium of radon and its daughter products gave us
satisfactory results. In this paper, the advantages and disadvantages of four different
methods of measuring radon in water will be shown: two LSC methods (monophase and
two-phase), RAD7 and gamma spectrometric method. All three methods have very low
minimal detectable activity (MDA) values, lower than 1 Bq l-1. In addition to the
different measurement techniques, a comparison of two methods for sampling of water
will be presented also on few examples.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Metode merenja Rn222 u vodi, Methods of Rn222 in water measurement",
pages = "500-506",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8321"
}

Nikolov, J., Todorović, N., Stojković, I., Tenjović, B., Vraničar, A., Knežević, J.,& Vuković, S.. (2017). Metode merenja Rn222 u vodi. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 500-506.
https://hdl.handle.net/21.15107/rcub_vinar_8321

Nikolov J, Todorović N, Stojković I, Tenjović B, Vraničar A, Knežević J, Vuković S. Metode merenja Rn222 u vodi. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:500-506.
https://hdl.handle.net/21.15107/rcub_vinar_8321 .

Nikolov, Jovana, Todorović, Nataša, Stojković, Ivana, Tenjović, Branislava, Vraničar, Andrej, Knežević, Jovana, Vuković, Srđan, "Metode merenja Rn222 u vodi" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):500-506,
https://hdl.handle.net/21.15107/rcub_vinar_8321 .

TY  - JOUR
AU  - Nikolov, Jovana
AU  - Todorović, Nataša
AU  - Janković, Marija M.
AU  - Vostinar, Marija
AU  - Bikit, Ištvan S.
AU  - Veskovic, Miroslav
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5198
AB  - The main aim of this paper was to compare different methods of preparing water samples for tritium analysis by ultra-low-level background liquid scintillation counter, Quantulus 1220. Three methods of sample preparation for low-level tritium measurement have been implemented in the Nuclear Physics Laboratory in Novi Sad: electrolytic enrichment, direct method without electrolytic enrichment and sample Oxidizer 307 method. The examined fresh water samples were rainfall collected during 6 months and water from a stream in the Vinca nuclear research center collected over 3 months. The obtained results using these three methods showed satisfying agreement. The appropriate measuring time by LSC for each sample prepared according to different methods has been determined. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Applied Radiation and Isotopes
T1  - Different methods for tritium determination in surface water by LSC
VL  - 71
IS  - 1
SP  - 51
EP  - 56
DO  - 10.1016/j.apradiso.2012.09.015
ER  - 

@article{
author = "Nikolov, Jovana and Todorović, Nataša and Janković, Marija M. and Vostinar, Marija and Bikit, Ištvan S. and Veskovic, Miroslav",
year = "2013",
abstract = "The main aim of this paper was to compare different methods of preparing water samples for tritium analysis by ultra-low-level background liquid scintillation counter, Quantulus 1220. Three methods of sample preparation for low-level tritium measurement have been implemented in the Nuclear Physics Laboratory in Novi Sad: electrolytic enrichment, direct method without electrolytic enrichment and sample Oxidizer 307 method. The examined fresh water samples were rainfall collected during 6 months and water from a stream in the Vinca nuclear research center collected over 3 months. The obtained results using these three methods showed satisfying agreement. The appropriate measuring time by LSC for each sample prepared according to different methods has been determined. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Applied Radiation and Isotopes",
title = "Different methods for tritium determination in surface water by LSC",
volume = "71",
number = "1",
pages = "51-56",
doi = "10.1016/j.apradiso.2012.09.015"
}

Nikolov, J., Todorović, N., Janković, M. M., Vostinar, M., Bikit, I. S.,& Veskovic, M.. (2013). Different methods for tritium determination in surface water by LSC. in Applied Radiation and Isotopes, 71(1), 51-56.
https://doi.org/10.1016/j.apradiso.2012.09.015

Nikolov J, Todorović N, Janković MM, Vostinar M, Bikit IS, Veskovic M. Different methods for tritium determination in surface water by LSC. in Applied Radiation and Isotopes. 2013;71(1):51-56.
doi:10.1016/j.apradiso.2012.09.015 .

Nikolov, Jovana, Todorović, Nataša, Janković, Marija M., Vostinar, Marija, Bikit, Ištvan S., Veskovic, Miroslav, "Different methods for tritium determination in surface water by LSC" in Applied Radiation and Isotopes, 71, no. 1 (2013):51-56,
https://doi.org/10.1016/j.apradiso.2012.09.015 . .

TY  - JOUR
AU  - Janković, Marija M.
AU  - Todorović, Dragana
AU  - Todorović, Nataša
AU  - Nikolov, Jovana
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5146
AB  - Gross alpha and beta activities, H-3, Ra-226, Th-232 and K-40 activities were measured in bottled mineral water produced in Serbia in order to assess its radiological quality. In 11 samples of tap water and in 1 sample of spring waters gross alpha and beta activity were determined. The natural activity concentration of alpha and beta emitting radionuclides are within the range recommended by World Health Organization. The tritium concentration in bottled mineral waters ranged from 0.023 +/- 0.012 to 0.046 +/- 0.006 Bq l(-1). The activity of Ra-226, Th-232 and K-40 were below the minimum detectable activity. In order to evaluate the annual effective dose for different classes of age, a conservative dosimetric calculation was carried out. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Applied Radiation and Isotopes
T1  - Natural radionuclides in drinking waters in Serbia
VL  - 70
IS  - 12
SP  - 2703
EP  - 2710
DO  - 10.1016/j.apradiso.2012.08.013
ER  - 

@article{
author = "Janković, Marija M. and Todorović, Dragana and Todorović, Nataša and Nikolov, Jovana",
year = "2012",
abstract = "Gross alpha and beta activities, H-3, Ra-226, Th-232 and K-40 activities were measured in bottled mineral water produced in Serbia in order to assess its radiological quality. In 11 samples of tap water and in 1 sample of spring waters gross alpha and beta activity were determined. The natural activity concentration of alpha and beta emitting radionuclides are within the range recommended by World Health Organization. The tritium concentration in bottled mineral waters ranged from 0.023 +/- 0.012 to 0.046 +/- 0.006 Bq l(-1). The activity of Ra-226, Th-232 and K-40 were below the minimum detectable activity. In order to evaluate the annual effective dose for different classes of age, a conservative dosimetric calculation was carried out. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Applied Radiation and Isotopes",
title = "Natural radionuclides in drinking waters in Serbia",
volume = "70",
number = "12",
pages = "2703-2710",
doi = "10.1016/j.apradiso.2012.08.013"
}

Janković, M. M., Todorović, D., Todorović, N.,& Nikolov, J.. (2012). Natural radionuclides in drinking waters in Serbia. in Applied Radiation and Isotopes, 70(12), 2703-2710.
https://doi.org/10.1016/j.apradiso.2012.08.013

Janković MM, Todorović D, Todorović N, Nikolov J. Natural radionuclides in drinking waters in Serbia. in Applied Radiation and Isotopes. 2012;70(12):2703-2710.
doi:10.1016/j.apradiso.2012.08.013 .

Janković, Marija M., Todorović, Dragana, Todorović, Nataša, Nikolov, Jovana, "Natural radionuclides in drinking waters in Serbia" in Applied Radiation and Isotopes, 70, no. 12 (2012):2703-2710,
https://doi.org/10.1016/j.apradiso.2012.08.013 . .