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  - 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  - Toth, Arpad
AU  - Efendi, Arif
AU  - Szil, Elemer
AU  - Ignjatov, Nevena
AU  - Jovančević, Nikola
AU  - Hansman, Jan
AU  - Krmar, Miodrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8284
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  - Fotonski snopovi FFF (Flattening Filter Free) terapijskih linearnih akceleratora zbog
bitno redukovane filtracije poseduju i niskoenergetsku komponentu. Aktivacijom
izomernog stanja 115mIn u sredini polja, kao i na njegovim ivicama načinjen je pokušaj
da se uporede spektralne karakteristike standardnih FF i FFF snopova. Merenja su
vršena u snopovima od 6 MeV na dva različita tipa akceleratora. Uprkos činjenici da je
kod obe vrste akceleratora dozni profil polja jednak, saturacione aktivnosti aktiviranih
uzoraka od prirodnog In se veoma razlikuju što ukazuje na značajne razlike u obliku
spektra.
AB  - Photon beams of FFF (Flattening Filter Free) therapeutic linear accelerator because of
substantially reduced filtration have noticeable low-energy component. With activation
of isomeric state of 115mIn in the middle of the field, and on its edges we made an
attempt to compare the spectral characteristics of standard FF and FFF beams.
Measurements were performed in beams of 6 MeV nominal energy in two different types
of accelerators. Despite the fact that in both types of accelerators have the same dose
profile of beam, the saturation activity of the activated samples of natural In are very
different, indicating significant differences in the form of spectrum.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Spektralne karakteristike FFF terapijskih fotonskih snopova merene fotoaktivacijom In-115m
T1  - Spectral characteristics of FFF therapeutic photon beams measured by photoactivation of In-115m
SP  - 266
EP  - 273
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8284
ER  - 

@conference{
author = "Toth, Arpad and Efendi, Arif and Szil, Elemer and Ignjatov, Nevena and Jovančević, Nikola and Hansman, Jan and Krmar, Miodrag",
year = "2017",
abstract = "Fotonski snopovi FFF (Flattening Filter Free) terapijskih linearnih akceleratora zbog
bitno redukovane filtracije poseduju i niskoenergetsku komponentu. Aktivacijom
izomernog stanja 115mIn u sredini polja, kao i na njegovim ivicama načinjen je pokušaj
da se uporede spektralne karakteristike standardnih FF i FFF snopova. Merenja su
vršena u snopovima od 6 MeV na dva različita tipa akceleratora. Uprkos činjenici da je
kod obe vrste akceleratora dozni profil polja jednak, saturacione aktivnosti aktiviranih
uzoraka od prirodnog In se veoma razlikuju što ukazuje na značajne razlike u obliku
spektra., Photon beams of FFF (Flattening Filter Free) therapeutic linear accelerator because of
substantially reduced filtration have noticeable low-energy component. With activation
of isomeric state of 115mIn in the middle of the field, and on its edges we made an
attempt to compare the spectral characteristics of standard FF and FFF beams.
Measurements were performed in beams of 6 MeV nominal energy in two different types
of accelerators. Despite the fact that in both types of accelerators have the same dose
profile of beam, the saturation activity of the activated samples of natural In are very
different, indicating significant differences in the form of spectrum.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Spektralne karakteristike FFF terapijskih fotonskih snopova merene fotoaktivacijom In-115m, Spectral characteristics of FFF therapeutic photon beams measured by photoactivation of In-115m",
pages = "266-273",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8284"
}

Toth, A., Efendi, A., Szil, E., Ignjatov, N., Jovančević, N., Hansman, J.,& Krmar, M.. (2017). Spektralne karakteristike FFF terapijskih fotonskih snopova merene fotoaktivacijom In-115m. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 266-273.
https://hdl.handle.net/21.15107/rcub_vinar_8284

Toth A, Efendi A, Szil E, Ignjatov N, Jovančević N, Hansman J, Krmar M. Spektralne karakteristike FFF terapijskih fotonskih snopova merene fotoaktivacijom In-115m. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:266-273.
https://hdl.handle.net/21.15107/rcub_vinar_8284 .

Toth, Arpad, Efendi, Arif, Szil, Elemer, Ignjatov, Nevena, Jovančević, Nikola, Hansman, Jan, Krmar, Miodrag, "Spektralne karakteristike FFF terapijskih fotonskih snopova merene fotoaktivacijom In-115m" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):266-273,
https://hdl.handle.net/21.15107/rcub_vinar_8284 .

TY  - CONF
AU  - Milaković, Milomir
AU  - Krmar, Miodrag
AU  - Bosnić, Nikola
AU  - Marić, Slavica
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8283
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  - Prilikom puštanja u rad terapijskog linearnog akceleratora dozimetrijska mjerenja se
rade samo u zračnom polju i ti podaci se unose u TPS (sistem za planiranje), dok
dozimetrijski podaci izvan zračnog polja nisu dobro dokumentovani. Neminovno je da
dijelovi tijela izvan zračnog polja budu izloženi određenoj dozi zračenja rasijanog u
tijelu pacijenta, akceleratorskoj glavi, kao i u samoj prostoriji. Razvojem tehnika
isporuke doze pomoću kojih imamo mnogo bolju konformalnost, ali isto tako imamo
više monitorskih jedinica čime se produžava vrijeme tretmana, a samim time izloženost
tijela nižim dozama zračenja. Takođe, koristimo više polja pod različitim uglovima
(IMRT) ili puni luk (VMAT). Sve ovo utiče da veća zapremina normalnog tkiva bude
izložena nižim dozama zračenja. Cilj ovog rada je da se procijeni vrijednost doze izvan
zračnog polja za tretmanske planove (3DCRT, IMRT i VMAT) napravljenih u Eclipse
13.6 TPS (Varian Medical Systems) koja je isporučena pomoću Clinac DHX (Varian
Medical Systems) linearnog akceleratora. Mjerenje je rađeno u Thorax Phantom-u
(CIRS) pomoću jonizacione komore na udaljenosti od ivice polja u rasponu od
1,75–15,75 cm.
AB  - When commissioning therapeutic linear accelerator dosimetric measurements are made
only in the air field and these data are entered in TPS (treatment planning system), and
dosimetry data out-of-field are not well documented. It is inevitable that parts of the
body out-of-field to be exposed to a certain dose of the scatter radiation in the patient's
body, accelerator head, as well as in the room. The development of technique delivery
doses with which we have a much better conformity, but also we have more of monitor
units that serve to prolong the treatment time, and thus the exposure of the body lower
doses of radiation. Also, use more fields at different angles (IMRT) or full arch (VMAT).
All this affects the larger volume of normal tissue is exposed to lower doses of
radiation. The aim of this study is to assess the value out-of-field dose for treatment
plans (3DCRT, IMRT and VMAT) made in Eclipse 13.6 TPS (Varian Medical Systems)
that is delivered using CLINAC DHX (Varian Medical Systems) linear accelerator.
Measurement was conducted in Thorax Phantom-in (CIRS) using ionization chamber at
the distance from the edge of the field in the range of (1.75 - 15.75) cm.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Procjena doze terapijskog linearnog akceleratora izvan polja zračenja pri korištenju različitih tehnika zračenja
T1  - Evaluation of therapeutic dose linear accelerator out-of-field using different techniques radiation
SP  - 259
EP  - 265
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8283
ER  - 

@conference{
author = "Milaković, Milomir and Krmar, Miodrag and Bosnić, Nikola and Marić, Slavica",
year = "2017",
abstract = "Prilikom puštanja u rad terapijskog linearnog akceleratora dozimetrijska mjerenja se
rade samo u zračnom polju i ti podaci se unose u TPS (sistem za planiranje), dok
dozimetrijski podaci izvan zračnog polja nisu dobro dokumentovani. Neminovno je da
dijelovi tijela izvan zračnog polja budu izloženi određenoj dozi zračenja rasijanog u
tijelu pacijenta, akceleratorskoj glavi, kao i u samoj prostoriji. Razvojem tehnika
isporuke doze pomoću kojih imamo mnogo bolju konformalnost, ali isto tako imamo
više monitorskih jedinica čime se produžava vrijeme tretmana, a samim time izloženost
tijela nižim dozama zračenja. Takođe, koristimo više polja pod različitim uglovima
(IMRT) ili puni luk (VMAT). Sve ovo utiče da veća zapremina normalnog tkiva bude
izložena nižim dozama zračenja. Cilj ovog rada je da se procijeni vrijednost doze izvan
zračnog polja za tretmanske planove (3DCRT, IMRT i VMAT) napravljenih u Eclipse
13.6 TPS (Varian Medical Systems) koja je isporučena pomoću Clinac DHX (Varian
Medical Systems) linearnog akceleratora. Mjerenje je rađeno u Thorax Phantom-u
(CIRS) pomoću jonizacione komore na udaljenosti od ivice polja u rasponu od
1,75–15,75 cm., When commissioning therapeutic linear accelerator dosimetric measurements are made
only in the air field and these data are entered in TPS (treatment planning system), and
dosimetry data out-of-field are not well documented. It is inevitable that parts of the
body out-of-field to be exposed to a certain dose of the scatter radiation in the patient's
body, accelerator head, as well as in the room. The development of technique delivery
doses with which we have a much better conformity, but also we have more of monitor
units that serve to prolong the treatment time, and thus the exposure of the body lower
doses of radiation. Also, use more fields at different angles (IMRT) or full arch (VMAT).
All this affects the larger volume of normal tissue is exposed to lower doses of
radiation. The aim of this study is to assess the value out-of-field dose for treatment
plans (3DCRT, IMRT and VMAT) made in Eclipse 13.6 TPS (Varian Medical Systems)
that is delivered using CLINAC DHX (Varian Medical Systems) linear accelerator.
Measurement was conducted in Thorax Phantom-in (CIRS) using ionization chamber at
the distance from the edge of the field in the range of (1.75 - 15.75) cm.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Procjena doze terapijskog linearnog akceleratora izvan polja zračenja pri korištenju različitih tehnika zračenja, Evaluation of therapeutic dose linear accelerator out-of-field using different techniques radiation",
pages = "259-265",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8283"
}

Milaković, M., Krmar, M., Bosnić, N.,& Marić, S.. (2017). Procjena doze terapijskog linearnog akceleratora izvan polja zračenja pri korištenju različitih tehnika zračenja. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 259-265.
https://hdl.handle.net/21.15107/rcub_vinar_8283

Milaković M, Krmar M, Bosnić N, Marić S. Procjena doze terapijskog linearnog akceleratora izvan polja zračenja pri korištenju različitih tehnika zračenja. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:259-265.
https://hdl.handle.net/21.15107/rcub_vinar_8283 .

Milaković, Milomir, Krmar, Miodrag, Bosnić, Nikola, Marić, Slavica, "Procjena doze terapijskog linearnog akceleratora izvan polja zračenja pri korištenju različitih tehnika zračenja" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):259-265,
https://hdl.handle.net/21.15107/rcub_vinar_8283 .

TY  - CONF
AU  - Krmar, Miodrag
AU  - Radnović, Dragan
AU  - Hansman, Jan
AU  - Mesaroš, Minučer
AU  - Betsou, Chrysoula
AU  - Jakšić, Tatjana
AU  - Vasić, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8262
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  - Активност природних радионуклида је мерена у 217 узорака маховина Hypnum
cupressiforme које су сакупљене крајем лета 2015. године на комплетној територији Републике Србије са циљем да се установи просторна дистрибуција
радионуклида. Мерења су вршена NaI детектором облика јаме. Посебна пажња
је посвећена 7Be који се већ деценијама користи као природни обележивач у
изучавању транспортних процеса у атмосфери. Добијено је да је дистрибуција
атмосферске депозиције 7Be неуниформна и да се најмања и највећа измерена
вредност разликују девет пута. Просторна дистрибуција 7Be не показује корелацију са рељефом терена за разлику од 137Cs кога има више у планинским и шумовитим пределима. Присутност радионуклида из урановог и торијумовог
низа у доброј мери зависи од структуре и састава тла на локацијама са којих су
узимани узорци.
AB  - The activities of natural radionuclide were measured in 217 moss samples that were
collected at the entire territory of Serbia. Measurements were taken by well-type NaI
detector in order to establish the spatial distribution of radionuclides. Special attention
was paid to 7Be. It is obtained that the distribution of atmospheric deposition of 7Be is
non-uniform; the minimum and maximum measured value differs nine times. No
coincidence of the spatial distribution of 7Be with the relief was observed. It was
noticed that higher values of 137Cs were detected in mountain and wooded areas. The
presence of radionuclides from the Uranium and Thorium chains in the large extent
depends on the structure of the soil at the sampling site.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Просторна дистрибуција природних радионуклида мерена у Србији употребом биомонитора
T1  - Spatial distribution of natural radionuclides measured by the use of mosses
SP  - 108
EP  - 116
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8262
ER  - 

@conference{
author = "Krmar, Miodrag and Radnović, Dragan and Hansman, Jan and Mesaroš, Minučer and Betsou, Chrysoula and Jakšić, Tatjana and Vasić, Predrag",
year = "2017",
abstract = "Активност природних радионуклида је мерена у 217 узорака маховина Hypnum
cupressiforme које су сакупљене крајем лета 2015. године на комплетној територији Републике Србије са циљем да се установи просторна дистрибуција
радионуклида. Мерења су вршена NaI детектором облика јаме. Посебна пажња
је посвећена 7Be који се већ деценијама користи као природни обележивач у
изучавању транспортних процеса у атмосфери. Добијено је да је дистрибуција
атмосферске депозиције 7Be неуниформна и да се најмања и највећа измерена
вредност разликују девет пута. Просторна дистрибуција 7Be не показује корелацију са рељефом терена за разлику од 137Cs кога има више у планинским и шумовитим пределима. Присутност радионуклида из урановог и торијумовог
низа у доброј мери зависи од структуре и састава тла на локацијама са којих су
узимани узорци., The activities of natural radionuclide were measured in 217 moss samples that were
collected at the entire territory of Serbia. Measurements were taken by well-type NaI
detector in order to establish the spatial distribution of radionuclides. Special attention
was paid to 7Be. It is obtained that the distribution of atmospheric deposition of 7Be is
non-uniform; the minimum and maximum measured value differs nine times. No
coincidence of the spatial distribution of 7Be with the relief was observed. It was
noticed that higher values of 137Cs were detected in mountain and wooded areas. The
presence of radionuclides from the Uranium and Thorium chains in the large extent
depends on the structure of the soil at the sampling site.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Просторна дистрибуција природних радионуклида мерена у Србији употребом биомонитора, Spatial distribution of natural radionuclides measured by the use of mosses",
pages = "108-116",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8262"
}

Krmar, M., Radnović, D., Hansman, J., Mesaroš, M., Betsou, C., Jakšić, T.,& Vasić, P.. (2017). Просторна дистрибуција природних радионуклида мерена у Србији употребом биомонитора. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 108-116.
https://hdl.handle.net/21.15107/rcub_vinar_8262

Krmar M, Radnović D, Hansman J, Mesaroš M, Betsou C, Jakšić T, Vasić P. Просторна дистрибуција природних радионуклида мерена у Србији употребом биомонитора. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:108-116.
https://hdl.handle.net/21.15107/rcub_vinar_8262 .

Krmar, Miodrag, Radnović, Dragan, Hansman, Jan, Mesaroš, Minučer, Betsou, Chrysoula, Jakšić, Tatjana, Vasić, Predrag, "Просторна дистрибуција природних радионуклида мерена у Србији употребом биомонитора" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):108-116,
https://hdl.handle.net/21.15107/rcub_vinar_8262 .

TY  - CONF
AU  - Betsou, Chrysoula
AU  - Tsakiri, Evdoxia
AU  - Hansman, Jan
AU  - Krmar, Miodrag
AU  - Ioannidou, Alexandra
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8260
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  - Terrestrial mosses obtain most of their nutrients directly from precipitation and dry
deposition, and they can be used for monitoring of airborne radionuclide depositions.
Ninetyfive samples of Hypnum Cupressiforme were collected in Northern Greece during
the end of summer 2016. After the preparation, mosses were measured in a
low-background HPGe detector with relative efficiency 32%. The activity
concentrations of 7
Be ranged from 69 to 1280 Bq kg-1, and the concentrations of 137Cs
ranged from 0 to 425 Bq kg-1. The concentrations of 210Pb were between 147 and 1920
Bq kg-1 and for 40K were between 120 and 750 Bq kg-1. Differences have been observed
in the activity concentrations between the mosses collected from ground surface, rocks,
branches and near roots. Finally, no correlation between the concentrations of 7
Be and
210Pb has been found.
AB  - Mahovine svoje nutrijente direktno dobijaju iz padavina i suvom depozicijom i mogu se
koristiti za monitoring depozicije radionuklida iz vazduha. Devedesetpet uzoraka
mahovina (Hypnum Cupressiforme) je sakupljeno u regionu Severne Grčke tokom kraja
leta 2016. godine. Posle pripreme, mahovine su merene na niskofonskom HPGe detektoru relativne efikasnosti 32%. Izmerene koncentracije aktivnosti 7
Be su bile od 69 do
1280 Bq kg-1, aktivnosti 137Cs od 0 do 425 Bq kg-1, aktivnosti 210Pb od 147 do
1920 Bq kg-1
, a
40K od 120 do 750 Bq kg-1. Primećene su razlike u koncentracijama
aktivnosti radionuklida u mahovinama koje su sakupljene sa zemlje, kamena, grana
stabala i blizu korena stabla. Između
7
Be i 210Pb nije pronađena nikakva korelacija.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Natural and artificial radionuclides in moss samples from the region of Northern Greece
T1  - Prirodni i proizvedeni radionuklidi u uzorcima mahovina iz regiona Severne Grčke
SP  - 92
EP  - 98
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8260
ER  - 

@conference{
author = "Betsou, Chrysoula and Tsakiri, Evdoxia and Hansman, Jan and Krmar, Miodrag and Ioannidou, Alexandra",
year = "2017",
abstract = "Terrestrial mosses obtain most of their nutrients directly from precipitation and dry
deposition, and they can be used for monitoring of airborne radionuclide depositions.
Ninetyfive samples of Hypnum Cupressiforme were collected in Northern Greece during
the end of summer 2016. After the preparation, mosses were measured in a
low-background HPGe detector with relative efficiency 32%. The activity
concentrations of 7
Be ranged from 69 to 1280 Bq kg-1, and the concentrations of 137Cs
ranged from 0 to 425 Bq kg-1. The concentrations of 210Pb were between 147 and 1920
Bq kg-1 and for 40K were between 120 and 750 Bq kg-1. Differences have been observed
in the activity concentrations between the mosses collected from ground surface, rocks,
branches and near roots. Finally, no correlation between the concentrations of 7
Be and
210Pb has been found., Mahovine svoje nutrijente direktno dobijaju iz padavina i suvom depozicijom i mogu se
koristiti za monitoring depozicije radionuklida iz vazduha. Devedesetpet uzoraka
mahovina (Hypnum Cupressiforme) je sakupljeno u regionu Severne Grčke tokom kraja
leta 2016. godine. Posle pripreme, mahovine su merene na niskofonskom HPGe detektoru relativne efikasnosti 32%. Izmerene koncentracije aktivnosti 7
Be su bile od 69 do
1280 Bq kg-1, aktivnosti 137Cs od 0 do 425 Bq kg-1, aktivnosti 210Pb od 147 do
1920 Bq kg-1
, a
40K od 120 do 750 Bq kg-1. Primećene su razlike u koncentracijama
aktivnosti radionuklida u mahovinama koje su sakupljene sa zemlje, kamena, grana
stabala i blizu korena stabla. Između
7
Be i 210Pb nije pronađena nikakva korelacija.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Natural and artificial radionuclides in moss samples from the region of Northern Greece, Prirodni i proizvedeni radionuklidi u uzorcima mahovina iz regiona Severne Grčke",
pages = "92-98",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8260"
}

Betsou, C., Tsakiri, E., Hansman, J., Krmar, M.,& Ioannidou, A.. (2017). Natural and artificial radionuclides in moss samples from the region of Northern Greece. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 92-98.
https://hdl.handle.net/21.15107/rcub_vinar_8260

Betsou C, Tsakiri E, Hansman J, Krmar M, Ioannidou A. Natural and artificial radionuclides in moss samples from the region of Northern Greece. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:92-98.
https://hdl.handle.net/21.15107/rcub_vinar_8260 .

Betsou, Chrysoula, Tsakiri, Evdoxia, Hansman, Jan, Krmar, Miodrag, Ioannidou, Alexandra, "Natural and artificial radionuclides in moss samples from the region of Northern Greece" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):92-98,
https://hdl.handle.net/21.15107/rcub_vinar_8260 .

TY  - JOUR
AU  - Krmar, Miodrag
AU  - Baucal, M.
AU  - Bozic, N.
AU  - Jovancevic, N.
AU  - Ciraj-Bjelac, Olivera
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4742
AB  - Purpose: This study was undertaken to explore the effects of the jaws and the MLC openings on the neutron dose equivalent (DE) at the maze door and neutron flux at the patient plane. Methods: The neutron dose equivalent was measured at the maze entrance door of a 15 MV therapy linear accelerator room. All measurements were performed using various field sizes up to 40 cm x 40 cm. Activation detectors constructed from natural Indium (In) were exposed at Cd envelope to neutrons in order to estimate relative changes of epithermal neutron fluences in the patient plane. Results: Our study showed that the dose equivalent at the maze door is at the highest when the jaw are closed and that maximal jaws opening reduces the DE by more than 20%. The neutron dose equivalent at the maze door measured for radiation fields defined by jaws do not differ significantly from the DE measured when MLC determines the same size radiation field. The epithermal capture reaction rate measured using different jaw openings differs by approximately 10%. When an MLC leaf is inserted into a fixed geometry for one opening of the jaws, an increase of the epithermal neutron capture reaction rate in Indium activation detectors was observed. Conclusions: There is no significant difference in the neutron DE when MLC defines radiation field instead of jaws. This leads to the conclusion that the overall number of neutrons remains similar and it does not depend on how primary photon beam was stopped-by the jaws or the MLC. An increase of the fast neutron capture reaction rate when MLC leaves are inserted probably originates from the neutron scattering. (C) 2012 American Association of Physicists in Medicine. [DOI: 10.1118/1.3682313]
T2  - Medical Physics
T1  - Neutron dose equivalent measured at the maze door with various openings for the jaws and MLC
VL  - 39
IS  - 3
SP  - 1278
EP  - 1281
DO  - 10.1118/1.3682313
ER  - 

@article{
author = "Krmar, Miodrag and Baucal, M. and Bozic, N. and Jovancevic, N. and Ciraj-Bjelac, Olivera",
year = "2012",
abstract = "Purpose: This study was undertaken to explore the effects of the jaws and the MLC openings on the neutron dose equivalent (DE) at the maze door and neutron flux at the patient plane. Methods: The neutron dose equivalent was measured at the maze entrance door of a 15 MV therapy linear accelerator room. All measurements were performed using various field sizes up to 40 cm x 40 cm. Activation detectors constructed from natural Indium (In) were exposed at Cd envelope to neutrons in order to estimate relative changes of epithermal neutron fluences in the patient plane. Results: Our study showed that the dose equivalent at the maze door is at the highest when the jaw are closed and that maximal jaws opening reduces the DE by more than 20%. The neutron dose equivalent at the maze door measured for radiation fields defined by jaws do not differ significantly from the DE measured when MLC determines the same size radiation field. The epithermal capture reaction rate measured using different jaw openings differs by approximately 10%. When an MLC leaf is inserted into a fixed geometry for one opening of the jaws, an increase of the epithermal neutron capture reaction rate in Indium activation detectors was observed. Conclusions: There is no significant difference in the neutron DE when MLC defines radiation field instead of jaws. This leads to the conclusion that the overall number of neutrons remains similar and it does not depend on how primary photon beam was stopped-by the jaws or the MLC. An increase of the fast neutron capture reaction rate when MLC leaves are inserted probably originates from the neutron scattering. (C) 2012 American Association of Physicists in Medicine. [DOI: 10.1118/1.3682313]",
journal = "Medical Physics",
title = "Neutron dose equivalent measured at the maze door with various openings for the jaws and MLC",
volume = "39",
number = "3",
pages = "1278-1281",
doi = "10.1118/1.3682313"
}

Krmar, M., Baucal, M., Bozic, N., Jovancevic, N.,& Ciraj-Bjelac, O.. (2012). Neutron dose equivalent measured at the maze door with various openings for the jaws and MLC. in Medical Physics, 39(3), 1278-1281.
https://doi.org/10.1118/1.3682313

Krmar M, Baucal M, Bozic N, Jovancevic N, Ciraj-Bjelac O. Neutron dose equivalent measured at the maze door with various openings for the jaws and MLC. in Medical Physics. 2012;39(3):1278-1281.
doi:10.1118/1.3682313 .

Krmar, Miodrag, Baucal, M., Bozic, N., Jovancevic, N., Ciraj-Bjelac, Olivera, "Neutron dose equivalent measured at the maze door with various openings for the jaws and MLC" in Medical Physics, 39, no. 3 (2012):1278-1281,
https://doi.org/10.1118/1.3682313 . .

TY  - JOUR
AU  - Bikit, Ištvan S.
AU  - Slivka, Jaroslav
AU  - Krmar, Miodrag
AU  - Durcic, Z
AU  - Zikic, N
AU  - Čonkič, Lj.
AU  - Veskovic, M
AU  - Aničin, Ivan V.
PY  - 1999
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2220
AB  - The results of a detailed study of the low-level performance of a NaI(Tl) shield added to an iron shielded HPGe spectrometer are presented. Both the slow and the fast anticoincidence gating modes were tested, the slow mode being found better suited for general low-level spectroscopy applications. In long runs the stability of the system in this mode is satisfactory. The anticoincidence action of the NaI(Tl) shield lowers the integral background of the iron shielded HPGe detector in the energy range from 30 keV to 2 MeV by a factor of 6.5, and suppresses the continuum above 150 keV by a factor larger than 10. (C) 1999 Elsevier Science B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - Detection limits of the NaI(Tl) shielded HPGe spectrometer
VL  - 421
IS  - 1-2
SP  - 266
EP  - 271
DO  - 10.1016/S0168-9002(98)01258-3
ER  - 

@article{
author = "Bikit, Ištvan S. and Slivka, Jaroslav and Krmar, Miodrag and Durcic, Z and Zikic, N and Čonkič, Lj. and Veskovic, M and Aničin, Ivan V.",
year = "1999",
abstract = "The results of a detailed study of the low-level performance of a NaI(Tl) shield added to an iron shielded HPGe spectrometer are presented. Both the slow and the fast anticoincidence gating modes were tested, the slow mode being found better suited for general low-level spectroscopy applications. In long runs the stability of the system in this mode is satisfactory. The anticoincidence action of the NaI(Tl) shield lowers the integral background of the iron shielded HPGe detector in the energy range from 30 keV to 2 MeV by a factor of 6.5, and suppresses the continuum above 150 keV by a factor larger than 10. (C) 1999 Elsevier Science B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "Detection limits of the NaI(Tl) shielded HPGe spectrometer",
volume = "421",
number = "1-2",
pages = "266-271",
doi = "10.1016/S0168-9002(98)01258-3"
}

Bikit, I. S., Slivka, J., Krmar, M., Durcic, Z., Zikic, N., Čonkič, Lj., Veskovic, M.,& Aničin, I. V.. (1999). Detection limits of the NaI(Tl) shielded HPGe spectrometer. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 421(1-2), 266-271.
https://doi.org/10.1016/S0168-9002(98)01258-3

Bikit IS, Slivka J, Krmar M, Durcic Z, Zikic N, Čonkič L, Veskovic M, Aničin IV. Detection limits of the NaI(Tl) shielded HPGe spectrometer. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 1999;421(1-2):266-271.
doi:10.1016/S0168-9002(98)01258-3 .

Bikit, Ištvan S., Slivka, Jaroslav, Krmar, Miodrag, Durcic, Z, Zikic, N, Čonkič, Lj., Veskovic, M, Aničin, Ivan V., "Detection limits of the NaI(Tl) shielded HPGe spectrometer" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 421, no. 1-2 (1999):266-271,
https://doi.org/10.1016/S0168-9002(98)01258-3 . .

TY  - JOUR
AU  - Bikit, Ištvan S.
AU  - Krmar, Miodrag
AU  - Slivka, Jaroslav
AU  - Veskovic, M
AU  - Čonkič, Lj.
AU  - Aničin, Ivan V.
PY  - 1998
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2201
AB  - The (O nu, EC, EC) double beta decay of Fe-54 was investigated. An upper limit on the half-life T GT 4.4x10(20) yr (at 68% confidence level) was derived. [S0556-2813(98)01410-1].
T2  - Physical Review C
T1  - New results on the double beta decay of iron
VL  - 58
IS  - 4
SP  - 2566
EP  - 2567
DO  - 10.1103/PhysRevC.58.2566
ER  - 

@article{
author = "Bikit, Ištvan S. and Krmar, Miodrag and Slivka, Jaroslav and Veskovic, M and Čonkič, Lj. and Aničin, Ivan V.",
year = "1998",
abstract = "The (O nu, EC, EC) double beta decay of Fe-54 was investigated. An upper limit on the half-life T GT 4.4x10(20) yr (at 68% confidence level) was derived. [S0556-2813(98)01410-1].",
journal = "Physical Review C",
title = "New results on the double beta decay of iron",
volume = "58",
number = "4",
pages = "2566-2567",
doi = "10.1103/PhysRevC.58.2566"
}

Bikit, I. S., Krmar, M., Slivka, J., Veskovic, M., Čonkič, Lj.,& Aničin, I. V.. (1998). New results on the double beta decay of iron. in Physical Review C, 58(4), 2566-2567.
https://doi.org/10.1103/PhysRevC.58.2566

Bikit IS, Krmar M, Slivka J, Veskovic M, Čonkič L, Aničin IV. New results on the double beta decay of iron. in Physical Review C. 1998;58(4):2566-2567.
doi:10.1103/PhysRevC.58.2566 .

Bikit, Ištvan S., Krmar, Miodrag, Slivka, Jaroslav, Veskovic, M, Čonkič, Lj., Aničin, Ivan V., "New results on the double beta decay of iron" in Physical Review C, 58, no. 4 (1998):2566-2567,
https://doi.org/10.1103/PhysRevC.58.2566 . .

TY  - JOUR
AU  - Bikit, Ištvan S.
AU  - Aničin, Ivan V.
AU  - Slivka, Jaroslav
AU  - Krmar, Miodrag
AU  - Puzović, Jovan M.
AU  - Čonkič, Lj.
PY  - 1996
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2037
AB  - The gamma spectrum of Cs-137 was measured by means of a low-level shielded and Compton-suppressed HpGe spectrometer. The gamma line with the energy 283.4 keV and absolute intensity of 5.3(14)X10(-6) was found. It was concluded that the 283.4 keV intermediate level in Ba-137 [seen earlier in (n,ngamma) measurements] is populated in the beta decay of Cs-137 with the comparative half-life of log ft=15.3(3).
T2  - Physical Review C
T1  - Population of the 283 keV level of Ba-137 by the beta decay of Cs-137
VL  - 54
IS  - 6
SP  - 3270
EP  - 3272
DO  - 10.1103/PhysRevC.54.3270
ER  - 

@article{
author = "Bikit, Ištvan S. and Aničin, Ivan V. and Slivka, Jaroslav and Krmar, Miodrag and Puzović, Jovan M. and Čonkič, Lj.",
year = "1996",
abstract = "The gamma spectrum of Cs-137 was measured by means of a low-level shielded and Compton-suppressed HpGe spectrometer. The gamma line with the energy 283.4 keV and absolute intensity of 5.3(14)X10(-6) was found. It was concluded that the 283.4 keV intermediate level in Ba-137 [seen earlier in (n,ngamma) measurements] is populated in the beta decay of Cs-137 with the comparative half-life of log ft=15.3(3).",
journal = "Physical Review C",
title = "Population of the 283 keV level of Ba-137 by the beta decay of Cs-137",
volume = "54",
number = "6",
pages = "3270-3272",
doi = "10.1103/PhysRevC.54.3270"
}

Bikit, I. S., Aničin, I. V., Slivka, J., Krmar, M., Puzović, J. M.,& Čonkič, Lj.. (1996). Population of the 283 keV level of Ba-137 by the beta decay of Cs-137. in Physical Review C, 54(6), 3270-3272.
https://doi.org/10.1103/PhysRevC.54.3270

Bikit IS, Aničin IV, Slivka J, Krmar M, Puzović JM, Čonkič L. Population of the 283 keV level of Ba-137 by the beta decay of Cs-137. in Physical Review C. 1996;54(6):3270-3272.
doi:10.1103/PhysRevC.54.3270 .

Bikit, Ištvan S., Aničin, Ivan V., Slivka, Jaroslav, Krmar, Miodrag, Puzović, Jovan M., Čonkič, Lj., "Population of the 283 keV level of Ba-137 by the beta decay of Cs-137" in Physical Review C, 54, no. 6 (1996):3270-3272,
https://doi.org/10.1103/PhysRevC.54.3270 . .