TY  - CONF
AU  - Zorko, Benjamin
AU  - Ajtić, Jelena
AU  - Nečemer, Marijan
AU  - Sarvan, Darko
AU  - Rajačić, Milica
AU  - Korun, Matjaž
AU  - Vodenik, Branko
AU  - Krneta Nikolić, Jelena
AU  - Glavič-Cindro, Denis
AU  - Vukanac, Ivana
AU  - Petrovič, Toni
AU  - Ilić, Zorana
AU  - Vidic, alf
AU  - Didović, Irma
AU  - Janušeski, Jovan
AU  - Anuševa, Jordanka
AU  - Dimovska, Snezana
AU  - Danilovski, Dejan
AU  - Anđelić, Tomislav
AU  - Zekić, Ranko
AU  - Svrkota, Nikola
AU  - Radonjić, Slavko
AU  - Petrinec, Branko
PY  - 2023
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/3271
AB  - Mjerenja koncentracije aktivnosti radionuklida Be-7 (berilij-7), Pb-210 (olovo
210) i Cs-137 (cezij-137) u Zemljinoj atmosferi neophodna su za razumijevanje
atmosferskih procesa, kvalitete zraka i radioaktivnosti okoliša. Berilij-7 je
radioaktivni izotop koji prvenstveno nastaje interakcijom kozmičkih zraka s
atomima dušika i kisika u gornjoj atmosferi. Njegov kratki poluživot čini ga
vrijednim tragačem za atmosferske procese u relativno kratkim vremenskim
razdobljima. Olovo-210 je radioaktivni izotop čiji je primarni izvor u atmosferi
raspad plina radona. S dužim poluživotom od Be-7, pogodan je za proučavanje
dugotrajnijih atmosferskih procesa. Cezij-137 je, s druge strane, antropogeni
radioizotop s vremenom poluraspada čak i dužim od onog Pb-210, što ga
čini dobrim dugoročnim ekološkim tragačem. Nedavno je uspostavljena baza
podataka za praćenje radioaktivnosti tla u zraku (GRAMON). Sadrži rezultate mjerenja radioaktivnosti u površinskom zraku na sedam lokacija: Beograd (Srbija),
Ljubljana i Krško (Slovenija), Sarajevo (Bosna i Hercegovina), Podgorica (Crna
Gora), Skopje i Bitola (Sjeverna Makedonija). Naš rad daje statističku analizu
mjesečnih (prosječnih) vrijednosti koncentracija aktivnosti radionuklida za svaku
lokaciju od 2010. do 2019. Rezultati pokazuju prostorne razlike i vremensku
evoluciju radioaktivnosti zraka u ovoj regiji koja je obično nedovoljno zastupljena
u velikim studijama.
AB  - Measurements of activity concentrations of radionuclides Be-7 (beryllium-7), Pb210 (lead210), and Cs-137 (cesium-137) in the Earth’s atmosphere are essential for
understanding atmospheric processes, air quality, and environmental radioactivity.
Beryllium-7 is a radioactive isotope produced primarily by cosmic ray interactions
with nitrogen and oxygen atoms in the upper atmosphere. Its short half-life makes
it a valuable tracer for atmospheric processes on relatively short timescales. Lead210 is a radioactive isotope whose primary source in the atmosphere is decay
of radon gas. With a longer half-life than Be-7, it is suitable for studying longerterm atmospheric processes. Cesium-137, on the other hand, is an anthropogenic
radioisotope with a half-life even longer than that of Pb-210, which makes it a good
long-term environmental tracer.
The Ground Air Radioactivity Monitoring (GRAMON) database has been recently
established. It contains the outcomes of radioactivity measurements in the surface air at seven locations: Belgrade (Serbia), Ljubljana and Krško (Slovenia),
Sarajevo (Bosnia and Herzegovina), Podgorica (Montenegro), Skopje and Bitola
(North Macedonia). Our paper gives a statistical analysis of monthly (average)
values of the radionuclides’ activity concentrations for each location from 2010
to 2019. The results demonstrate spatial differences and temporal evolution of air
radioactivity over this region commonly underrepresented in large-scale studies.
PB  - Bilje : Javna ustanova „Park prirode Kopački rit“
C3  - 12. simpozija s međunarodnim sudjelovanjem KOPAČKI RIT / jučer, danas, sutra / 2023, Osijek, 28. – 29. rujna 2023.
T1  - Mjerenje koncentracija aktivnosti Be-7, Pb-210 i Cs-137 u površinskoj atmosferi
T1  - Measurements of Be-7, Pb-210 and Cs-137 activity concentrations in the surface atmosphere
SP  - 250
EP  - 253
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_3271
ER  - 

@conference{
author = "Zorko, Benjamin and Ajtić, Jelena and Nečemer, Marijan and Sarvan, Darko and Rajačić, Milica and Korun, Matjaž and Vodenik, Branko and Krneta Nikolić, Jelena and Glavič-Cindro, Denis and Vukanac, Ivana and Petrovič, Toni and Ilić, Zorana and Vidic, alf and Didović, Irma and Janušeski, Jovan and Anuševa, Jordanka and Dimovska, Snezana and Danilovski, Dejan and Anđelić, Tomislav and Zekić, Ranko and Svrkota, Nikola and Radonjić, Slavko and Petrinec, Branko",
year = "2023",
abstract = "Mjerenja koncentracije aktivnosti radionuklida Be-7 (berilij-7), Pb-210 (olovo
210) i Cs-137 (cezij-137) u Zemljinoj atmosferi neophodna su za razumijevanje
atmosferskih procesa, kvalitete zraka i radioaktivnosti okoliša. Berilij-7 je
radioaktivni izotop koji prvenstveno nastaje interakcijom kozmičkih zraka s
atomima dušika i kisika u gornjoj atmosferi. Njegov kratki poluživot čini ga
vrijednim tragačem za atmosferske procese u relativno kratkim vremenskim
razdobljima. Olovo-210 je radioaktivni izotop čiji je primarni izvor u atmosferi
raspad plina radona. S dužim poluživotom od Be-7, pogodan je za proučavanje
dugotrajnijih atmosferskih procesa. Cezij-137 je, s druge strane, antropogeni
radioizotop s vremenom poluraspada čak i dužim od onog Pb-210, što ga
čini dobrim dugoročnim ekološkim tragačem. Nedavno je uspostavljena baza
podataka za praćenje radioaktivnosti tla u zraku (GRAMON). Sadrži rezultate mjerenja radioaktivnosti u površinskom zraku na sedam lokacija: Beograd (Srbija),
Ljubljana i Krško (Slovenija), Sarajevo (Bosna i Hercegovina), Podgorica (Crna
Gora), Skopje i Bitola (Sjeverna Makedonija). Naš rad daje statističku analizu
mjesečnih (prosječnih) vrijednosti koncentracija aktivnosti radionuklida za svaku
lokaciju od 2010. do 2019. Rezultati pokazuju prostorne razlike i vremensku
evoluciju radioaktivnosti zraka u ovoj regiji koja je obično nedovoljno zastupljena
u velikim studijama., Measurements of activity concentrations of radionuclides Be-7 (beryllium-7), Pb210 (lead210), and Cs-137 (cesium-137) in the Earth’s atmosphere are essential for
understanding atmospheric processes, air quality, and environmental radioactivity.
Beryllium-7 is a radioactive isotope produced primarily by cosmic ray interactions
with nitrogen and oxygen atoms in the upper atmosphere. Its short half-life makes
it a valuable tracer for atmospheric processes on relatively short timescales. Lead210 is a radioactive isotope whose primary source in the atmosphere is decay
of radon gas. With a longer half-life than Be-7, it is suitable for studying longerterm atmospheric processes. Cesium-137, on the other hand, is an anthropogenic
radioisotope with a half-life even longer than that of Pb-210, which makes it a good
long-term environmental tracer.
The Ground Air Radioactivity Monitoring (GRAMON) database has been recently
established. It contains the outcomes of radioactivity measurements in the surface air at seven locations: Belgrade (Serbia), Ljubljana and Krško (Slovenia),
Sarajevo (Bosnia and Herzegovina), Podgorica (Montenegro), Skopje and Bitola
(North Macedonia). Our paper gives a statistical analysis of monthly (average)
values of the radionuclides’ activity concentrations for each location from 2010
to 2019. The results demonstrate spatial differences and temporal evolution of air
radioactivity over this region commonly underrepresented in large-scale studies.",
publisher = "Bilje : Javna ustanova „Park prirode Kopački rit“",
journal = "12. simpozija s međunarodnim sudjelovanjem KOPAČKI RIT / jučer, danas, sutra / 2023, Osijek, 28. – 29. rujna 2023.",
title = "Mjerenje koncentracija aktivnosti Be-7, Pb-210 i Cs-137 u površinskoj atmosferi, Measurements of Be-7, Pb-210 and Cs-137 activity concentrations in the surface atmosphere",
pages = "250-253",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_3271"
}

Zorko, B., Ajtić, J., Nečemer, M., Sarvan, D., Rajačić, M., Korun, M., Vodenik, B., Krneta Nikolić, J., Glavič-Cindro, D., Vukanac, I., Petrovič, T., Ilić, Z., Vidic, a., Didović, I., Janušeski, J., Anuševa, J., Dimovska, S., Danilovski, D., Anđelić, T., Zekić, R., Svrkota, N., Radonjić, S.,& Petrinec, B.. (2023). Mjerenje koncentracija aktivnosti Be-7, Pb-210 i Cs-137 u površinskoj atmosferi. in 12. simpozija s međunarodnim sudjelovanjem KOPAČKI RIT / jučer, danas, sutra / 2023, Osijek, 28. – 29. rujna 2023.
Bilje : Javna ustanova „Park prirode Kopački rit“., 250-253.
https://hdl.handle.net/21.15107/rcub_veterinar_3271

Zorko B, Ajtić J, Nečemer M, Sarvan D, Rajačić M, Korun M, Vodenik B, Krneta Nikolić J, Glavič-Cindro D, Vukanac I, Petrovič T, Ilić Z, Vidic A, Didović I, Janušeski J, Anuševa J, Dimovska S, Danilovski D, Anđelić T, Zekić R, Svrkota N, Radonjić S, Petrinec B. Mjerenje koncentracija aktivnosti Be-7, Pb-210 i Cs-137 u površinskoj atmosferi. in 12. simpozija s međunarodnim sudjelovanjem KOPAČKI RIT / jučer, danas, sutra / 2023, Osijek, 28. – 29. rujna 2023.. 2023;:250-253.
https://hdl.handle.net/21.15107/rcub_veterinar_3271 .

Zorko, Benjamin, Ajtić, Jelena, Nečemer, Marijan, Sarvan, Darko, Rajačić, Milica, Korun, Matjaž, Vodenik, Branko, Krneta Nikolić, Jelena, Glavič-Cindro, Denis, Vukanac, Ivana, Petrovič, Toni, Ilić, Zorana, Vidic, alf, Didović, Irma, Janušeski, Jovan, Anuševa, Jordanka, Dimovska, Snezana, Danilovski, Dejan, Anđelić, Tomislav, Zekić, Ranko, Svrkota, Nikola, Radonjić, Slavko, Petrinec, Branko, "Mjerenje koncentracija aktivnosti Be-7, Pb-210 i Cs-137 u površinskoj atmosferi" in 12. simpozija s međunarodnim sudjelovanjem KOPAČKI RIT / jučer, danas, sutra / 2023, Osijek, 28. – 29. rujna 2023. (2023):250-253,
https://hdl.handle.net/21.15107/rcub_veterinar_3271 .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Rajačić, Milica
AU  - Krneta Nikolić, Jelena
AU  - Vukanac, Ivana
AU  - Ilić, Zorana
AU  - Vidic, Alfred
AU  - Didović, Irma
AU  - Janushesk, Jovan
AU  - Anusheva, Jordanka
AU  - Dimovska, Snežana
AU  - Danilovski, Dejan
AU  - Anđelić, Tomislav
AU  - Zekić, Ranko
AU  - Svrkota, Nikola
AU  - Radonjić, Slavko
AU  - Vodenik, Branko
AU  - Zorko, Benjamin
PY  - 2023
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/3269
AB  - U radu je predstavljena novoformirana baza podataka GRAMON (Ground Air Radioactivity Monitoring) koja sadrži rezultate merenja radioaktivnosti u vazduhu na sedam lokacija: Beograd (Srbija), Ljubljana i Krško (Slovenija), Sarajevo (Bosna i Hercegovina), Podgorica (Crna Gora), Skoplje i Bitola (Severna Makedonija). Iz baze su za sve lokacije preuzete mesečne vrednosti specifične aktivnosti prirodnog radionuklida berilijuma-7 i potom analizirani deskriptivni statistički parametri od januara 2010. do decembra 2019. godine.
Srednje vrednosti specifične aktivnosti berilijuma-7 tokom ovog perioda kreću se od 3,32 mBq/m3 u Sarajevu do 5,93 mBq/m3 u Beogradu. Koeficijent varijacije najmanji je za Krško (37,7%) i Sarajevo (38,6%), a najveći za Beograd (54,8%) i Bitolu (72,4%). Ipak, 3σ-opsezi svih sedam vremenskih serija se preklapaju. U daljoj statističkoj analizi biće ispitano da li među ovim vremenskim serijama postoje značajne razlike.
PB  - Institut za nuklearne nauke „Vinča“
PB  - Društvo za zaštitu od zračenja Srbije i Srne Gore
C3  - XXXII Simpozijum Društva za zaštitu od zračenja Srbije i Crne Gore, Budva, 4 - 6. oktobar 2023
T1  - GRAMON baza podataka: Desetogodišnja merenja specifične aktivnosti berilijuma-7 u vazduhu
SP  - 30
EP  - 35
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_3269
ER  - 

@conference{
author = "Ajtić, Jelena and Rajačić, Milica and Krneta Nikolić, Jelena and Vukanac, Ivana and Ilić, Zorana and Vidic, Alfred and Didović, Irma and Janushesk, Jovan and Anusheva, Jordanka and Dimovska, Snežana and Danilovski, Dejan and Anđelić, Tomislav and Zekić, Ranko and Svrkota, Nikola and Radonjić, Slavko and Vodenik, Branko and Zorko, Benjamin",
year = "2023",
abstract = "U radu je predstavljena novoformirana baza podataka GRAMON (Ground Air Radioactivity Monitoring) koja sadrži rezultate merenja radioaktivnosti u vazduhu na sedam lokacija: Beograd (Srbija), Ljubljana i Krško (Slovenija), Sarajevo (Bosna i Hercegovina), Podgorica (Crna Gora), Skoplje i Bitola (Severna Makedonija). Iz baze su za sve lokacije preuzete mesečne vrednosti specifične aktivnosti prirodnog radionuklida berilijuma-7 i potom analizirani deskriptivni statistički parametri od januara 2010. do decembra 2019. godine.
Srednje vrednosti specifične aktivnosti berilijuma-7 tokom ovog perioda kreću se od 3,32 mBq/m3 u Sarajevu do 5,93 mBq/m3 u Beogradu. Koeficijent varijacije najmanji je za Krško (37,7%) i Sarajevo (38,6%), a najveći za Beograd (54,8%) i Bitolu (72,4%). Ipak, 3σ-opsezi svih sedam vremenskih serija se preklapaju. U daljoj statističkoj analizi biće ispitano da li među ovim vremenskim serijama postoje značajne razlike.",
publisher = "Institut za nuklearne nauke „Vinča“, Društvo za zaštitu od zračenja Srbije i Srne Gore",
journal = "XXXII Simpozijum Društva za zaštitu od zračenja Srbije i Crne Gore, Budva, 4 - 6. oktobar 2023",
title = "GRAMON baza podataka: Desetogodišnja merenja specifične aktivnosti berilijuma-7 u vazduhu",
pages = "30-35",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_3269"
}

Ajtić, J., Rajačić, M., Krneta Nikolić, J., Vukanac, I., Ilić, Z., Vidic, A., Didović, I., Janushesk, J., Anusheva, J., Dimovska, S., Danilovski, D., Anđelić, T., Zekić, R., Svrkota, N., Radonjić, S., Vodenik, B.,& Zorko, B.. (2023). GRAMON baza podataka: Desetogodišnja merenja specifične aktivnosti berilijuma-7 u vazduhu. in XXXII Simpozijum Društva za zaštitu od zračenja Srbije i Crne Gore, Budva, 4 - 6. oktobar 2023
Institut za nuklearne nauke „Vinča“., 30-35.
https://hdl.handle.net/21.15107/rcub_veterinar_3269

Ajtić J, Rajačić M, Krneta Nikolić J, Vukanac I, Ilić Z, Vidic A, Didović I, Janushesk J, Anusheva J, Dimovska S, Danilovski D, Anđelić T, Zekić R, Svrkota N, Radonjić S, Vodenik B, Zorko B. GRAMON baza podataka: Desetogodišnja merenja specifične aktivnosti berilijuma-7 u vazduhu. in XXXII Simpozijum Društva za zaštitu od zračenja Srbije i Crne Gore, Budva, 4 - 6. oktobar 2023. 2023;:30-35.
https://hdl.handle.net/21.15107/rcub_veterinar_3269 .

Ajtić, Jelena, Rajačić, Milica, Krneta Nikolić, Jelena, Vukanac, Ivana, Ilić, Zorana, Vidic, Alfred, Didović, Irma, Janushesk, Jovan, Anusheva, Jordanka, Dimovska, Snežana, Danilovski, Dejan, Anđelić, Tomislav, Zekić, Ranko, Svrkota, Nikola, Radonjić, Slavko, Vodenik, Branko, Zorko, Benjamin, "GRAMON baza podataka: Desetogodišnja merenja specifične aktivnosti berilijuma-7 u vazduhu" in XXXII Simpozijum Društva za zaštitu od zračenja Srbije i Crne Gore, Budva, 4 - 6. oktobar 2023 (2023):30-35,
https://hdl.handle.net/21.15107/rcub_veterinar_3269 .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Sarvan, Darko
AU  - Rajačić, Milica
AU  - Krneta Nikolić, Jelena
AU  - Vukanac, Ivana
AU  - Ilić, Zorana
AU  - Vidic, Alfred
AU  - Didović, Irma
AU  - Janušeski, Jovan
AU  - Anusheva, Jordanka
AU  - Dimovska, Snezana
AU  - Danilovski, Dejan
AU  - Anđelić, Tomislav
AU  - Zekić, Ranko
AU  - Svrkota, Nikola
AU  - Radonjić, Slavko
AU  - Vodenik, Branko
AU  - Zorko, Benjamin
PY  - 2023
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/3003
AB  - Ground Air Radioactivity Monitoring (GRAMON) database is a recently established collection containing activity concentrations of gamma emitters in aerosol samples. The measurements come
from Serbia (sampling site Belgrade), Slovenia (sampling sites Ljubljana and Krško), Bosnia and
Herzegovina (sampling site Sarajevo), Montenegro (sampling site Podgorica), and North Macedonia (sampling sites Skopje and Bitola), thus covering the northern and central parts of the Balkan Peninsula.
As a database arising from the monitoring programmes in several countries, GRAMON is not
fully homogeneous in terms of the radionuclides and time periods studied. For example, the
beryllium-7 records are available for all sampling sites, while the lead-210 records only in Serbia,
Slovenia, and Bosnia and Herzegovina. The time series for Serbia and Slovenia began in 1991, for
Montenegro and North Macedonia in 2008, and for Bosnia and Herzegovina in 2010.
However, sampling, sample preparation, and measurement procedures across the sites and
laboratories are similar. In brief, aerosol samples are collected on filter papers using air samplers.
Activity concentrations of radionuclides are determined by standard gamma spectrometry using
high-purity germanium detectors. The time series contain monthly mean activity concentrations.
Since only some of the GRAMON records have been previously published, this database provides
a source for radioactivity research in the region that has been underrepresented in large-scale
studies. We further hope to expand the number of contributing laboratories and cover a wider region of Europe, especially its southern and eastern parts.
PB  - Niš : Sievert Association
C3  - International Conference on Radiation Applications RAP, Anavyssos, May 29 - June 2, 2023
T1  - Introducing a regional database of radioactivity in the air – GRAMON
SP  - 91
EP  - 91
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_3003
ER  - 

@conference{
author = "Ajtić, Jelena and Sarvan, Darko and Rajačić, Milica and Krneta Nikolić, Jelena and Vukanac, Ivana and Ilić, Zorana and Vidic, Alfred and Didović, Irma and Janušeski, Jovan and Anusheva, Jordanka and Dimovska, Snezana and Danilovski, Dejan and Anđelić, Tomislav and Zekić, Ranko and Svrkota, Nikola and Radonjić, Slavko and Vodenik, Branko and Zorko, Benjamin",
year = "2023",
abstract = "Ground Air Radioactivity Monitoring (GRAMON) database is a recently established collection containing activity concentrations of gamma emitters in aerosol samples. The measurements come
from Serbia (sampling site Belgrade), Slovenia (sampling sites Ljubljana and Krško), Bosnia and
Herzegovina (sampling site Sarajevo), Montenegro (sampling site Podgorica), and North Macedonia (sampling sites Skopje and Bitola), thus covering the northern and central parts of the Balkan Peninsula.
As a database arising from the monitoring programmes in several countries, GRAMON is not
fully homogeneous in terms of the radionuclides and time periods studied. For example, the
beryllium-7 records are available for all sampling sites, while the lead-210 records only in Serbia,
Slovenia, and Bosnia and Herzegovina. The time series for Serbia and Slovenia began in 1991, for
Montenegro and North Macedonia in 2008, and for Bosnia and Herzegovina in 2010.
However, sampling, sample preparation, and measurement procedures across the sites and
laboratories are similar. In brief, aerosol samples are collected on filter papers using air samplers.
Activity concentrations of radionuclides are determined by standard gamma spectrometry using
high-purity germanium detectors. The time series contain monthly mean activity concentrations.
Since only some of the GRAMON records have been previously published, this database provides
a source for radioactivity research in the region that has been underrepresented in large-scale
studies. We further hope to expand the number of contributing laboratories and cover a wider region of Europe, especially its southern and eastern parts.",
publisher = "Niš : Sievert Association",
journal = "International Conference on Radiation Applications RAP, Anavyssos, May 29 - June 2, 2023",
title = "Introducing a regional database of radioactivity in the air – GRAMON",
pages = "91-91",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_3003"
}

Ajtić, J., Sarvan, D., Rajačić, M., Krneta Nikolić, J., Vukanac, I., Ilić, Z., Vidic, A., Didović, I., Janušeski, J., Anusheva, J., Dimovska, S., Danilovski, D., Anđelić, T., Zekić, R., Svrkota, N., Radonjić, S., Vodenik, B.,& Zorko, B.. (2023). Introducing a regional database of radioactivity in the air – GRAMON. in International Conference on Radiation Applications RAP, Anavyssos, May 29 - June 2, 2023
Niš : Sievert Association., 91-91.
https://hdl.handle.net/21.15107/rcub_veterinar_3003

Ajtić J, Sarvan D, Rajačić M, Krneta Nikolić J, Vukanac I, Ilić Z, Vidic A, Didović I, Janušeski J, Anusheva J, Dimovska S, Danilovski D, Anđelić T, Zekić R, Svrkota N, Radonjić S, Vodenik B, Zorko B. Introducing a regional database of radioactivity in the air – GRAMON. in International Conference on Radiation Applications RAP, Anavyssos, May 29 - June 2, 2023. 2023;:91-91.
https://hdl.handle.net/21.15107/rcub_veterinar_3003 .

Ajtić, Jelena, Sarvan, Darko, Rajačić, Milica, Krneta Nikolić, Jelena, Vukanac, Ivana, Ilić, Zorana, Vidic, Alfred, Didović, Irma, Janušeski, Jovan, Anusheva, Jordanka, Dimovska, Snezana, Danilovski, Dejan, Anđelić, Tomislav, Zekić, Ranko, Svrkota, Nikola, Radonjić, Slavko, Vodenik, Branko, Zorko, Benjamin, "Introducing a regional database of radioactivity in the air – GRAMON" in International Conference on Radiation Applications RAP, Anavyssos, May 29 - June 2, 2023 (2023):91-91,
https://hdl.handle.net/21.15107/rcub_veterinar_3003 .

TY  - CONF
AU  - Bianchi, Stefano
AU  - Plastino, Wolfango
AU  - Rajačić, Milica
AU  - Krneta Nikolić, Jelena
AU  - Todorović, Dragana
AU  - Zorko, Benjamin
AU  - Nečemer, Marijan
AU  - Vodenik, Branko
AU  - Glavič Cindro, Denis
AU  - Kožar Logar, Jasmina
AU  - Sarvan, Darko
AU  - Đurđević, Vladimir
AU  - Ajtić, Jelena
PY  - 2022
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2479
AB  - Beryllium-7 is a natural radionuclide used as a tracer of the stratospheric-tropospheric exchange. Its abundance in the surface air is expected to change as the temperatures in the atmosphere increase.
To investigate the temporal trends of the beryllium-7 activity concentrations and temperature, we apply spectral analysis to time series from three sampling sites: Belgrade in Serbia, and Ljubljana and Krško in Slovenia. The sites lie close to the 45 ºN parallel, with Krško approximately 400 km and Ljubljana around 500 km west of Belgrade. Between January 1991 and December 2019, the air filter samples were collected using air samplers; a monthly composite sample was formed and analysed by gamma spectrometry. We use monthly mean temperature records from the European Climate Assessment & Dataset, the Republic Hydrometeorological Service of Serbia for Belgrade, and the Slovenian Environment Agency for the sites in Slovenia.
In the spectral analysis decomposition, we look into a term called trend that represents the overall growth (increase or decrease) in the data records. The trend is calculated using a linear fit. All three sites show 1) positive temperature trends, however statistically insignificant (at the 95 % confidence level), and 2) statistically significant beryllium-7 activity concentration trends of 2.26 %/year, 1.13 %/year, and 0.50 %/year in Belgrade, Ljubljana, and Krško, respectively.
The results confirm our initial hypothesis–over the 28 investigated years, the beryllium-7 activity concentrations increase in the surface air. On the other hand, the non-significant temperature rise in our records suggests that within our method, the temporal resolution of one month is insufficient for obtaining a statistically significant temperature trend.
PB  - Niš : Sievert Association
C3  - International conference on radiation applications (RAP 2022)
T1  - Beryllium-7 activity concentration trends in Serbia and Slovenia
SP  - 45
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2479
ER  - 

@conference{
author = "Bianchi, Stefano and Plastino, Wolfango and Rajačić, Milica and Krneta Nikolić, Jelena and Todorović, Dragana and Zorko, Benjamin and Nečemer, Marijan and Vodenik, Branko and Glavič Cindro, Denis and Kožar Logar, Jasmina and Sarvan, Darko and Đurđević, Vladimir and Ajtić, Jelena",
year = "2022",
abstract = "Beryllium-7 is a natural radionuclide used as a tracer of the stratospheric-tropospheric exchange. Its abundance in the surface air is expected to change as the temperatures in the atmosphere increase.
To investigate the temporal trends of the beryllium-7 activity concentrations and temperature, we apply spectral analysis to time series from three sampling sites: Belgrade in Serbia, and Ljubljana and Krško in Slovenia. The sites lie close to the 45 ºN parallel, with Krško approximately 400 km and Ljubljana around 500 km west of Belgrade. Between January 1991 and December 2019, the air filter samples were collected using air samplers; a monthly composite sample was formed and analysed by gamma spectrometry. We use monthly mean temperature records from the European Climate Assessment & Dataset, the Republic Hydrometeorological Service of Serbia for Belgrade, and the Slovenian Environment Agency for the sites in Slovenia.
In the spectral analysis decomposition, we look into a term called trend that represents the overall growth (increase or decrease) in the data records. The trend is calculated using a linear fit. All three sites show 1) positive temperature trends, however statistically insignificant (at the 95 % confidence level), and 2) statistically significant beryllium-7 activity concentration trends of 2.26 %/year, 1.13 %/year, and 0.50 %/year in Belgrade, Ljubljana, and Krško, respectively.
The results confirm our initial hypothesis–over the 28 investigated years, the beryllium-7 activity concentrations increase in the surface air. On the other hand, the non-significant temperature rise in our records suggests that within our method, the temporal resolution of one month is insufficient for obtaining a statistically significant temperature trend.",
publisher = "Niš : Sievert Association",
journal = "International conference on radiation applications (RAP 2022)",
title = "Beryllium-7 activity concentration trends in Serbia and Slovenia",
pages = "45",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2479"
}

Bianchi, S., Plastino, W., Rajačić, M., Krneta Nikolić, J., Todorović, D., Zorko, B., Nečemer, M., Vodenik, B., Glavič Cindro, D., Kožar Logar, J., Sarvan, D., Đurđević, V.,& Ajtić, J.. (2022). Beryllium-7 activity concentration trends in Serbia and Slovenia. in International conference on radiation applications (RAP 2022)
Niš : Sievert Association., 45.
https://hdl.handle.net/21.15107/rcub_veterinar_2479

Bianchi S, Plastino W, Rajačić M, Krneta Nikolić J, Todorović D, Zorko B, Nečemer M, Vodenik B, Glavič Cindro D, Kožar Logar J, Sarvan D, Đurđević V, Ajtić J. Beryllium-7 activity concentration trends in Serbia and Slovenia. in International conference on radiation applications (RAP 2022). 2022;:45.
https://hdl.handle.net/21.15107/rcub_veterinar_2479 .

Bianchi, Stefano, Plastino, Wolfango, Rajačić, Milica, Krneta Nikolić, Jelena, Todorović, Dragana, Zorko, Benjamin, Nečemer, Marijan, Vodenik, Branko, Glavič Cindro, Denis, Kožar Logar, Jasmina, Sarvan, Darko, Đurđević, Vladimir, Ajtić, Jelena, "Beryllium-7 activity concentration trends in Serbia and Slovenia" in International conference on radiation applications (RAP 2022) (2022):45,
https://hdl.handle.net/21.15107/rcub_veterinar_2479 .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Sarvan, Darko
AU  - Nečemer, Marijan
AU  - Todorović, Dragana
AU  - Rajačić, Milica
AU  - Krneta Nikolić, Jelena
AU  - Djurdjević, Vladimir
AU  - Vodenik, Branko
AU  - Glavič Cindro, Denis
AU  - Kožar Logar, Jasmina
AU  - Zorko, Benjamin
PY  - 2019
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2342
AB  - Activity concentrations of cosmogenic beryllium-7, terragenic lead-210 and artificial caesium-137
are closely observed within environmental radioactivity monitoring programmes in Serbia and
Slovenia. In this study, we compare the temporal evolution and seasonal cycles of the radionuclides
recorded over 1991–2015 in three locations: Belgrade (44.88333 °N; 20.583333 °E; 95 m a.s.l.), the
capital of the Republic of Serbia; Krško (45.950414 °N; 15.512261 °E; 204 m a.s.l.), a town in eastern
Slovenia, located ~400 km west of Belgrade; and Ljubljana (46.042356 °N; 14.487494 °E;
292 m a.s.l.), the capital of the Republic of Slovenia, located ~500 km west of Belgrade. The latitudes
of these three sites differ only slightly, approximately by 1°.
The similarities between the data sets are evident from their measurement ranges and long-term
means. For example, the recorded beryllium-7 activity concentrations fall within the ranges reported
for different locations in Europe. In the lead-210 series, the observed values are similar to the activity
concentrations reported for some neighbouring regions, but around twofold higher than in locations
that are under a significant maritime influence, thus removed from this radionuclide’s source. The
activity concentrations of caesium-137 at all the sites are of the same order of magnitude and agree
with the post-Chernobyl picture of the fall-out in Europe.
However, there are some noticeable differences in the seasonal cycles of these radionuclides at
the investigated sites. For example, even though the beryllium-7 seasonal cycles in all the sites exhibit
a spring/summer maximum and a winter minimum, the timing of the maximum recorded at the
Slovenian sites is agreement with other Western European sites of similar latitude in contrast to the
Belgrade site that shows an earlier occurrence of the maximum, more in line with European locations
further north.
A possible explanation for the observed dissimilarities could lie in the differences of the
meteorological patterns in the investigated sites. According to Köppen-Geiger climate classification,
Krško and Ljubljana have Warm temperate fully humid climate with warm summers (Cfb), while
Belgrade is characterised by Warm temperate fully humid climate with hot summers (Cfa). Belgrade
is located deeper in the continental landmass, and its climate has more of midlatitude continental
characteristics, in terms of higher summer temperature, more pronounced seasonal temperature
amplitude, and lower precipitation, especially during summer months. These differences in climate
affect the transport and removal of the radionuclides from the atmosphere and could lead to the
observed dissimilarities. Still, a detailed analysis of the radionuclides’ time series and their relation to
the time series of the meteorological parameters is needed to better understand their interconnexion.
PB  - Niš : Sievert Association
C3  - Book of Abstracts of the International Conference on Radiation Applications, September 16–19, 2019, Beograd, Srbija
T1  - Comparison of the beryllium-7, lead-210 and caesium-137 activity concentrations in the surface air along 45 °N in Serbia and Slovenia
SP  - 27
EP  - 27
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2342
ER  - 

@conference{
author = "Ajtić, Jelena and Sarvan, Darko and Nečemer, Marijan and Todorović, Dragana and Rajačić, Milica and Krneta Nikolić, Jelena and Djurdjević, Vladimir and Vodenik, Branko and Glavič Cindro, Denis and Kožar Logar, Jasmina and Zorko, Benjamin",
year = "2019",
abstract = "Activity concentrations of cosmogenic beryllium-7, terragenic lead-210 and artificial caesium-137
are closely observed within environmental radioactivity monitoring programmes in Serbia and
Slovenia. In this study, we compare the temporal evolution and seasonal cycles of the radionuclides
recorded over 1991–2015 in three locations: Belgrade (44.88333 °N; 20.583333 °E; 95 m a.s.l.), the
capital of the Republic of Serbia; Krško (45.950414 °N; 15.512261 °E; 204 m a.s.l.), a town in eastern
Slovenia, located ~400 km west of Belgrade; and Ljubljana (46.042356 °N; 14.487494 °E;
292 m a.s.l.), the capital of the Republic of Slovenia, located ~500 km west of Belgrade. The latitudes
of these three sites differ only slightly, approximately by 1°.
The similarities between the data sets are evident from their measurement ranges and long-term
means. For example, the recorded beryllium-7 activity concentrations fall within the ranges reported
for different locations in Europe. In the lead-210 series, the observed values are similar to the activity
concentrations reported for some neighbouring regions, but around twofold higher than in locations
that are under a significant maritime influence, thus removed from this radionuclide’s source. The
activity concentrations of caesium-137 at all the sites are of the same order of magnitude and agree
with the post-Chernobyl picture of the fall-out in Europe.
However, there are some noticeable differences in the seasonal cycles of these radionuclides at
the investigated sites. For example, even though the beryllium-7 seasonal cycles in all the sites exhibit
a spring/summer maximum and a winter minimum, the timing of the maximum recorded at the
Slovenian sites is agreement with other Western European sites of similar latitude in contrast to the
Belgrade site that shows an earlier occurrence of the maximum, more in line with European locations
further north.
A possible explanation for the observed dissimilarities could lie in the differences of the
meteorological patterns in the investigated sites. According to Köppen-Geiger climate classification,
Krško and Ljubljana have Warm temperate fully humid climate with warm summers (Cfb), while
Belgrade is characterised by Warm temperate fully humid climate with hot summers (Cfa). Belgrade
is located deeper in the continental landmass, and its climate has more of midlatitude continental
characteristics, in terms of higher summer temperature, more pronounced seasonal temperature
amplitude, and lower precipitation, especially during summer months. These differences in climate
affect the transport and removal of the radionuclides from the atmosphere and could lead to the
observed dissimilarities. Still, a detailed analysis of the radionuclides’ time series and their relation to
the time series of the meteorological parameters is needed to better understand their interconnexion.",
publisher = "Niš : Sievert Association",
journal = "Book of Abstracts of the International Conference on Radiation Applications, September 16–19, 2019, Beograd, Srbija",
title = "Comparison of the beryllium-7, lead-210 and caesium-137 activity concentrations in the surface air along 45 °N in Serbia and Slovenia",
pages = "27-27",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2342"
}

Ajtić, J., Sarvan, D., Nečemer, M., Todorović, D., Rajačić, M., Krneta Nikolić, J., Djurdjević, V., Vodenik, B., Glavič Cindro, D., Kožar Logar, J.,& Zorko, B.. (2019). Comparison of the beryllium-7, lead-210 and caesium-137 activity concentrations in the surface air along 45 °N in Serbia and Slovenia. in Book of Abstracts of the International Conference on Radiation Applications, September 16–19, 2019, Beograd, Srbija
Niš : Sievert Association., 27-27.
https://hdl.handle.net/21.15107/rcub_veterinar_2342

Ajtić J, Sarvan D, Nečemer M, Todorović D, Rajačić M, Krneta Nikolić J, Djurdjević V, Vodenik B, Glavič Cindro D, Kožar Logar J, Zorko B. Comparison of the beryllium-7, lead-210 and caesium-137 activity concentrations in the surface air along 45 °N in Serbia and Slovenia. in Book of Abstracts of the International Conference on Radiation Applications, September 16–19, 2019, Beograd, Srbija. 2019;:27-27.
https://hdl.handle.net/21.15107/rcub_veterinar_2342 .

Ajtić, Jelena, Sarvan, Darko, Nečemer, Marijan, Todorović, Dragana, Rajačić, Milica, Krneta Nikolić, Jelena, Djurdjević, Vladimir, Vodenik, Branko, Glavič Cindro, Denis, Kožar Logar, Jasmina, Zorko, Benjamin, "Comparison of the beryllium-7, lead-210 and caesium-137 activity concentrations in the surface air along 45 °N in Serbia and Slovenia" in Book of Abstracts of the International Conference on Radiation Applications, September 16–19, 2019, Beograd, Srbija (2019):27-27,
https://hdl.handle.net/21.15107/rcub_veterinar_2342 .

TY  - CONF
AU  - Sarvan, Darko
AU  - Todorović, Dragana
AU  - Rajačić, Milica
AU  - Krneta Nikolić, Jelena
AU  - Djurdjević, Vladimir
AU  - Zorko, Benjamin
AU  - Vodenik, Branko
AU  - Glavič Cindro, Denis
AU  - Kožar Logar, Jasmina
AU  - Ajtić, Jelena
PY  - 2018
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2346
AB  - Cosmogenic beryllium-7 (Be-7) and a long-lived radon progeny lead-210 (Pb-210) are radionuclides commonly measured in the environmental radioactivity programmes. Although their production mechanisms and points of entry into the atmosphere differ, there is a strong interconnection between their behaviour since they are transported through the atmosphere attached to aerosols. Thus, their abundance is governed by the atmospheric processes and both are considered good tracers of air mass origin. In this paper, we use the Be-7and Pb-210 specific activities measured in Serbia and Slovenia to investigate the degree of their similarities across a distance of about 500 km. Specifically, in an attempt to distinguish major influencing mechanisms, we apply factor analysis to the radionuclides’ measurements conducted over 1991–2015 in Belgrade, Serbia, and Ljubljana and Krško, both in Slovenia. The factor analysis also includes the following meteorological parameters at each sampling site: temperature, cloud cover, relative humidity, precipitation and atmospheric pressure (not available at the Krško site). The results of the factor analysis show that the communalities of only two factors are already larger than 0.5 for most of the variables. The exceptions are the atmospheric pressure in Belgrade and precipitation in both Belgrade and Ljubljana. The factor loadings of two factors show that: 1) the Be-7 specific activity, temperature, cloud cover and relative humidity are encompassed by factor 1 in all the sites; while 2) the Pb-210 specific activity is described by factor 2 together with atmospheric pressure in Belgrade and Ljubljana, but with precipitation in Krško (where atmospheric pressure is not available). These results imply that the Be-7 and Pb-210 are under different dominant underlying mechanisms. Over the investigated 24 years, both the Be-7 and Pb-210 measurements across the three sites show a very good agreement in the measurement ranges and overall means. However, a closer examination of the differences in the data time series reveal an exception to this general agreement – during 2005– 2012, there is a pronounced increase in radionuclides’ concentrations in Ljubljana and Krško, relative to Belgrade. Therefore, factor analysis is also performed for this shorter time period. The obtained factor loadings show a change in the influence of the major two factors. Compared to 1991–2015, the influence of factor 2 on Be-7 increases in Belgrade and decreases in Ljubljana. On the other hand, an influence of factor 1 on Pb-210 decreases in Belgrade, but increases in Ljubljana and Krško. These opposing changes might explain the relatively high differences in the radionuclides’ concentrations seen over 2005–2012.
PB  - Niš : RAD Association
C3  - 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia
T1  - Behaviour of the beryllium-7 and lead-210 time series measured in Serbia and Slovenia over 1991-2015
SP  - 185
EP  - 185
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2346
ER  - 

@conference{
author = "Sarvan, Darko and Todorović, Dragana and Rajačić, Milica and Krneta Nikolić, Jelena and Djurdjević, Vladimir and Zorko, Benjamin and Vodenik, Branko and Glavič Cindro, Denis and Kožar Logar, Jasmina and Ajtić, Jelena",
year = "2018",
abstract = "Cosmogenic beryllium-7 (Be-7) and a long-lived radon progeny lead-210 (Pb-210) are radionuclides commonly measured in the environmental radioactivity programmes. Although their production mechanisms and points of entry into the atmosphere differ, there is a strong interconnection between their behaviour since they are transported through the atmosphere attached to aerosols. Thus, their abundance is governed by the atmospheric processes and both are considered good tracers of air mass origin. In this paper, we use the Be-7and Pb-210 specific activities measured in Serbia and Slovenia to investigate the degree of their similarities across a distance of about 500 km. Specifically, in an attempt to distinguish major influencing mechanisms, we apply factor analysis to the radionuclides’ measurements conducted over 1991–2015 in Belgrade, Serbia, and Ljubljana and Krško, both in Slovenia. The factor analysis also includes the following meteorological parameters at each sampling site: temperature, cloud cover, relative humidity, precipitation and atmospheric pressure (not available at the Krško site). The results of the factor analysis show that the communalities of only two factors are already larger than 0.5 for most of the variables. The exceptions are the atmospheric pressure in Belgrade and precipitation in both Belgrade and Ljubljana. The factor loadings of two factors show that: 1) the Be-7 specific activity, temperature, cloud cover and relative humidity are encompassed by factor 1 in all the sites; while 2) the Pb-210 specific activity is described by factor 2 together with atmospheric pressure in Belgrade and Ljubljana, but with precipitation in Krško (where atmospheric pressure is not available). These results imply that the Be-7 and Pb-210 are under different dominant underlying mechanisms. Over the investigated 24 years, both the Be-7 and Pb-210 measurements across the three sites show a very good agreement in the measurement ranges and overall means. However, a closer examination of the differences in the data time series reveal an exception to this general agreement – during 2005– 2012, there is a pronounced increase in radionuclides’ concentrations in Ljubljana and Krško, relative to Belgrade. Therefore, factor analysis is also performed for this shorter time period. The obtained factor loadings show a change in the influence of the major two factors. Compared to 1991–2015, the influence of factor 2 on Be-7 increases in Belgrade and decreases in Ljubljana. On the other hand, an influence of factor 1 on Pb-210 decreases in Belgrade, but increases in Ljubljana and Krško. These opposing changes might explain the relatively high differences in the radionuclides’ concentrations seen over 2005–2012.",
publisher = "Niš : RAD Association",
journal = "6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia",
title = "Behaviour of the beryllium-7 and lead-210 time series measured in Serbia and Slovenia over 1991-2015",
pages = "185-185",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2346"
}

Sarvan, D., Todorović, D., Rajačić, M., Krneta Nikolić, J., Djurdjević, V., Zorko, B., Vodenik, B., Glavič Cindro, D., Kožar Logar, J.,& Ajtić, J.. (2018). Behaviour of the beryllium-7 and lead-210 time series measured in Serbia and Slovenia over 1991-2015. in 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia
Niš : RAD Association., 185-185.
https://hdl.handle.net/21.15107/rcub_veterinar_2346

Sarvan D, Todorović D, Rajačić M, Krneta Nikolić J, Djurdjević V, Zorko B, Vodenik B, Glavič Cindro D, Kožar Logar J, Ajtić J. Behaviour of the beryllium-7 and lead-210 time series measured in Serbia and Slovenia over 1991-2015. in 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia. 2018;:185-185.
https://hdl.handle.net/21.15107/rcub_veterinar_2346 .

Sarvan, Darko, Todorović, Dragana, Rajačić, Milica, Krneta Nikolić, Jelena, Djurdjević, Vladimir, Zorko, Benjamin, Vodenik, Branko, Glavič Cindro, Denis, Kožar Logar, Jasmina, Ajtić, Jelena, "Behaviour of the beryllium-7 and lead-210 time series measured in Serbia and Slovenia over 1991-2015" in 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia (2018):185-185,
https://hdl.handle.net/21.15107/rcub_veterinar_2346 .

TY  - CONF
AU  - Zorko, Benjamin
AU  - Ajtić, Jelena
AU  - Vodenik, Branko
AU  - Glavič Cindro, Denis
AU  - Rajačić, Milica
AU  - Petrovič, Toni
AU  - Krneta-Nikolić, Jelena D.
AU  - Janković, Marija M.
AU  - Sarap, Nataša
AU  - Vukanac, Ivana
AU  - Pantelić, Gordana K.
AU  - Todorović, Dragana
PY  - 2018
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2345
AB  - The isotopes of ruthenium (Ru-106, Ru-103) were detected by several European environmental networks involved in the monitoring of atmospheric radioactive contamination in late September 2017. The radioactive cloud passed over the countries in the east and south-east of Europe, while other countries in Europe were just brushed up with very low activity concentrations of Ru-106. Ruthenium is very rare and hence its presence may suggest that an event of some nature occurred. Ruthenium-106 is a fission product from the nuclear industry and it is also used in medical procedures, such as brachytherapy treatments. Ruthenium-106 is a beta emitter with a half-life of 1.02 year so the isotopic presence may persist for some time, with its duration depending on many factors. Apart from the disintegration of Ru-106 to the ground state of a short-lived Rh-106, some characteristic gamma rays are emitted. The origin of Ru-106 in the atmosphere is still unclear. Among the countries that were affected by the passage of the radioactive cloud containing isotopes of ruthenium were the Republic of Slovenia and Republic of Serbia. The activity concentrations of Ru106 in the air detected in several stations of both countries were of a similar magnitude. The activity concentrations were determined by standard gamma spectrometry measurements at the Vinča Institute of Nuclear Sciences and Jožef Stefan Institute for the Serbian and Slovenian sampling sites, respectively. Ruthenium was also detected in trace levels in other environmental media (precipitation). Several statistical calculations to compare measurement results in Slovenia and Serbia are carried out. Those calculations also take into account other radionuclides, such as cosmogenic beryllium-7 and a long-lived radon progeny lead-210, to investigate possible atmospheric processes accompanying the release of ruthenium.
PB  - Niš : RAD Association
C3  - 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia
T1  - Comparison of concentration activities of ruthenium isotopes measured over Slovenia and Serbia
SP  - 193
EP  - 193
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2345
ER  - 

@conference{
author = "Zorko, Benjamin and Ajtić, Jelena and Vodenik, Branko and Glavič Cindro, Denis and Rajačić, Milica and Petrovič, Toni and Krneta-Nikolić, Jelena D. and Janković, Marija M. and Sarap, Nataša and Vukanac, Ivana and Pantelić, Gordana K. and Todorović, Dragana",
year = "2018",
abstract = "The isotopes of ruthenium (Ru-106, Ru-103) were detected by several European environmental networks involved in the monitoring of atmospheric radioactive contamination in late September 2017. The radioactive cloud passed over the countries in the east and south-east of Europe, while other countries in Europe were just brushed up with very low activity concentrations of Ru-106. Ruthenium is very rare and hence its presence may suggest that an event of some nature occurred. Ruthenium-106 is a fission product from the nuclear industry and it is also used in medical procedures, such as brachytherapy treatments. Ruthenium-106 is a beta emitter with a half-life of 1.02 year so the isotopic presence may persist for some time, with its duration depending on many factors. Apart from the disintegration of Ru-106 to the ground state of a short-lived Rh-106, some characteristic gamma rays are emitted. The origin of Ru-106 in the atmosphere is still unclear. Among the countries that were affected by the passage of the radioactive cloud containing isotopes of ruthenium were the Republic of Slovenia and Republic of Serbia. The activity concentrations of Ru106 in the air detected in several stations of both countries were of a similar magnitude. The activity concentrations were determined by standard gamma spectrometry measurements at the Vinča Institute of Nuclear Sciences and Jožef Stefan Institute for the Serbian and Slovenian sampling sites, respectively. Ruthenium was also detected in trace levels in other environmental media (precipitation). Several statistical calculations to compare measurement results in Slovenia and Serbia are carried out. Those calculations also take into account other radionuclides, such as cosmogenic beryllium-7 and a long-lived radon progeny lead-210, to investigate possible atmospheric processes accompanying the release of ruthenium.",
publisher = "Niš : RAD Association",
journal = "6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia",
title = "Comparison of concentration activities of ruthenium isotopes measured over Slovenia and Serbia",
pages = "193-193",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2345"
}

Zorko, B., Ajtić, J., Vodenik, B., Glavič Cindro, D., Rajačić, M., Petrovič, T., Krneta-Nikolić, J. D., Janković, M. M., Sarap, N., Vukanac, I., Pantelić, G. K.,& Todorović, D.. (2018). Comparison of concentration activities of ruthenium isotopes measured over Slovenia and Serbia. in 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia
Niš : RAD Association., 193-193.
https://hdl.handle.net/21.15107/rcub_veterinar_2345

Zorko B, Ajtić J, Vodenik B, Glavič Cindro D, Rajačić M, Petrovič T, Krneta-Nikolić JD, Janković MM, Sarap N, Vukanac I, Pantelić GK, Todorović D. Comparison of concentration activities of ruthenium isotopes measured over Slovenia and Serbia. in 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia. 2018;:193-193.
https://hdl.handle.net/21.15107/rcub_veterinar_2345 .

Zorko, Benjamin, Ajtić, Jelena, Vodenik, Branko, Glavič Cindro, Denis, Rajačić, Milica, Petrovič, Toni, Krneta-Nikolić, Jelena D., Janković, Marija M., Sarap, Nataša, Vukanac, Ivana, Pantelić, Gordana K., Todorović, Dragana, "Comparison of concentration activities of ruthenium isotopes measured over Slovenia and Serbia" in 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia (2018):193-193,
https://hdl.handle.net/21.15107/rcub_veterinar_2345 .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Sarvan, Darko
AU  - Todorović, Dragana
AU  - Rajačić, Milica
AU  - Krneta Nikolić, Jelena
AU  - Djurdjević, Vladimir
AU  - Zorko, Benjamin
AU  - Vodenik, Branko
AU  - Cindro Glavič, Denis
AU  - Jasmina, Kožar Logar
PY  - 2017
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2438
AB  - Beryllium-7 is a natural radionuclide produced in spallation processes in the upper troposphere
and lower stratosphere. Descent through the atmosphere brings this isotope to the lower altitudes and
its abundance at the surface is a result of an interplay between transport and removal processes, both
of which are influenced by local meteorological parameters.
In this analysis we use the beryllium-7 specific activities measured in three locations to investigate
spatial similarities and differences in the data sets. The measurement sites are: Belgrade, the capital of
Serbia; Ljubljana, the capital of Slovenia, located around 500 km west of Belgrade; and Krško, a town
in eastern Slovenia, located around 400 km west of Belgrade. The beryllium-7 measurements in Serbia
and Slovenia started in 1991 and 1988, respectively. The specific activities were determined by standard
gamma spectrometry at the Vinča Institute (Serbia) and Jožef Stefan Institute (Slovenia).
PB  - RAD Association
C3  - Fifth International Conference on Radiation and Applications in Various Fields of Research, RAD 2017, 12.06 - 16.06. Budva, Montenegro
T1  - Beryllium-7 in surface air–Multidecadal measurements in Serbia and Slovenia
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2438
ER  - 

@conference{
author = "Ajtić, Jelena and Sarvan, Darko and Todorović, Dragana and Rajačić, Milica and Krneta Nikolić, Jelena and Djurdjević, Vladimir and Zorko, Benjamin and Vodenik, Branko and Cindro Glavič, Denis and Jasmina, Kožar Logar",
year = "2017",
abstract = "Beryllium-7 is a natural radionuclide produced in spallation processes in the upper troposphere
and lower stratosphere. Descent through the atmosphere brings this isotope to the lower altitudes and
its abundance at the surface is a result of an interplay between transport and removal processes, both
of which are influenced by local meteorological parameters.
In this analysis we use the beryllium-7 specific activities measured in three locations to investigate
spatial similarities and differences in the data sets. The measurement sites are: Belgrade, the capital of
Serbia; Ljubljana, the capital of Slovenia, located around 500 km west of Belgrade; and Krško, a town
in eastern Slovenia, located around 400 km west of Belgrade. The beryllium-7 measurements in Serbia
and Slovenia started in 1991 and 1988, respectively. The specific activities were determined by standard
gamma spectrometry at the Vinča Institute (Serbia) and Jožef Stefan Institute (Slovenia).",
publisher = "RAD Association",
journal = "Fifth International Conference on Radiation and Applications in Various Fields of Research, RAD 2017, 12.06 - 16.06. Budva, Montenegro",
title = "Beryllium-7 in surface air–Multidecadal measurements in Serbia and Slovenia",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2438"
}

Ajtić, J., Sarvan, D., Todorović, D., Rajačić, M., Krneta Nikolić, J., Djurdjević, V., Zorko, B., Vodenik, B., Cindro Glavič, D.,& Jasmina, K. L.. (2017). Beryllium-7 in surface air–Multidecadal measurements in Serbia and Slovenia. in Fifth International Conference on Radiation and Applications in Various Fields of Research, RAD 2017, 12.06 - 16.06. Budva, Montenegro
RAD Association..
https://hdl.handle.net/21.15107/rcub_veterinar_2438

Ajtić J, Sarvan D, Todorović D, Rajačić M, Krneta Nikolić J, Djurdjević V, Zorko B, Vodenik B, Cindro Glavič D, Jasmina KL. Beryllium-7 in surface air–Multidecadal measurements in Serbia and Slovenia. in Fifth International Conference on Radiation and Applications in Various Fields of Research, RAD 2017, 12.06 - 16.06. Budva, Montenegro. 2017;.
https://hdl.handle.net/21.15107/rcub_veterinar_2438 .

Ajtić, Jelena, Sarvan, Darko, Todorović, Dragana, Rajačić, Milica, Krneta Nikolić, Jelena, Djurdjević, Vladimir, Zorko, Benjamin, Vodenik, Branko, Cindro Glavič, Denis, Jasmina, Kožar Logar, "Beryllium-7 in surface air–Multidecadal measurements in Serbia and Slovenia" in Fifth International Conference on Radiation and Applications in Various Fields of Research, RAD 2017, 12.06 - 16.06. Budva, Montenegro (2017),
https://hdl.handle.net/21.15107/rcub_veterinar_2438 .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Sarvan, Darko
AU  - Todorović, Dragana
AU  - Rajačić, Milica
AU  - Krneta-Nikolić, Jelena D.
AU  - Đurđević, Vladimir
AU  - Zorko, Benjamin
AU  - Vodenik, Branko
AU  - Glavič-Cindro, Denis
AU  - Kožar Logar, Jasmina
PY  - 2017
AB  - Međusobna povezanost specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnomsloju atmosfere sa meteorološkim parametrima razmotrena je u faktorskoj analizi.Merenja su sprovedena u Beogradu, Republika Srbija, i u Ljubljani i Krškom, uRepublici Sloveniji, tokom 1991–2015 godine. Na sve tri lokacije, faktorska opterećenjadva faktora pokazuju da je: 1) specifična aktivnost berilijuma-7 obuhvaćena faktorom 1sa temperaturom, oblačnošću i relativnom vlažnošću; dok je 2) specifična aktivnostolova-210 obuhvaćena faktorom 2 sa količinom padavina i atmosferskim pritiskom.Iako je komunalitet već dva faktora veći od 0,5 za većinu posmatranih varijabli, tekuvođenjem trećeg faktora komunalitet za specifičnu aktivnost olova-210 i atmosferskogpritiska na sve tri merne lokacije raste na preko 0,5. Rezultati faktorske analizepokazuju da se specifične aktivnosti berilijuma-7 i olova-210 u prizmenom slojuatmosfere nalaze pod različitim dominantnim uticajima. Koncentracija berilijuma-7 jepod uticajem faktora regionalnog karaktera, koji je takođe dominantan za srednjutemperaturu. Ova veza specifične aktivnosti berilijuma-7 i temperature preko dominantnog zajedničkog faktora važi i kada se broj faktora u analizi poveća na tri i četiri.Sa druge strane, na koncentraciju olova-210, kao i na količinu padavina i atmosferskipritisak, više uticaja ima lokalni faktor. Ova povezanost olova-210 sa druga dvameteorološka parametra, međutim, prestaje da važi sa povećanjem broja faktora uanalizi na tri, kada se izdvaja specifičan faktor koji objašnjava preko 80% varijansespecifične aktivnosti olova-210.
AB  - An association between the beryllium-7 and lead-210 specific activities in surface airand meteorological parameters is investigated using factor analysis. The measurementswere conducted in Belgrade, Republic of Serbia, and Ljubljana and Krško, Republic ofSlovenia, over 1991–2015. In all the locations, the factor loadings of two factors showthat: 1) the beryllium-7 specific activity is encompassed by factor 1 together withtemperature, cloud cover and relative humidity; while 2) the lead-210 specific activity,precipitation and atmospheric pressure are described by factor 2. Although thecommunalities of only two factors are already larger than 0.5 for most of the variables,an introduction of a third factor raises the communalities of all the variables above 0.5.The results imply that the beryllium-7 and lead-210 are under different dominantunderlying mechanisms. The concentration of beryllium-7 seems to be primarilyinfluenced by a mechanism of a regional character which is also a predominant factorfor temperature. This association between the beryllium-7 specific activity andtemperature prevails even when the number of factors in the analysis is raised to threeand four. The lead-210 specific activity, on the other hand, together with precipitationand atmospheric pressure, is under an influence of a local mechanism, but thatrelationship between the variables ceases to hold when the number of factors is raisedto three, and more than 80% of the variance in the Pb-210 specific activity is explainedby one specific factor.
PB  - Beograd : Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija
T1  - Faktorska analiza specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnom sloju vazduha, i meteoroloških parametara
T1  - Factor analysis of the beryllium-7 and lead-210 specific activities in surface air, and meteorological parameters
SP  - 19
EP  - 27
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2375
ER  - 

@conference{
author = "Ajtić, Jelena and Sarvan, Darko and Todorović, Dragana and Rajačić, Milica and Krneta-Nikolić, Jelena D. and Đurđević, Vladimir and Zorko, Benjamin and Vodenik, Branko and Glavič-Cindro, Denis and Kožar Logar, Jasmina",
year = "2017",
abstract = "Međusobna povezanost specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnomsloju atmosfere sa meteorološkim parametrima razmotrena je u faktorskoj analizi.Merenja su sprovedena u Beogradu, Republika Srbija, i u Ljubljani i Krškom, uRepublici Sloveniji, tokom 1991–2015 godine. Na sve tri lokacije, faktorska opterećenjadva faktora pokazuju da je: 1) specifična aktivnost berilijuma-7 obuhvaćena faktorom 1sa temperaturom, oblačnošću i relativnom vlažnošću; dok je 2) specifična aktivnostolova-210 obuhvaćena faktorom 2 sa količinom padavina i atmosferskim pritiskom.Iako je komunalitet već dva faktora veći od 0,5 za većinu posmatranih varijabli, tekuvođenjem trećeg faktora komunalitet za specifičnu aktivnost olova-210 i atmosferskogpritiska na sve tri merne lokacije raste na preko 0,5. Rezultati faktorske analizepokazuju da se specifične aktivnosti berilijuma-7 i olova-210 u prizmenom slojuatmosfere nalaze pod različitim dominantnim uticajima. Koncentracija berilijuma-7 jepod uticajem faktora regionalnog karaktera, koji je takođe dominantan za srednjutemperaturu. Ova veza specifične aktivnosti berilijuma-7 i temperature preko dominantnog zajedničkog faktora važi i kada se broj faktora u analizi poveća na tri i četiri.Sa druge strane, na koncentraciju olova-210, kao i na količinu padavina i atmosferskipritisak, više uticaja ima lokalni faktor. Ova povezanost olova-210 sa druga dvameteorološka parametra, međutim, prestaje da važi sa povećanjem broja faktora uanalizi na tri, kada se izdvaja specifičan faktor koji objašnjava preko 80% varijansespecifične aktivnosti olova-210., An association between the beryllium-7 and lead-210 specific activities in surface airand meteorological parameters is investigated using factor analysis. The measurementswere conducted in Belgrade, Republic of Serbia, and Ljubljana and Krško, Republic ofSlovenia, over 1991–2015. In all the locations, the factor loadings of two factors showthat: 1) the beryllium-7 specific activity is encompassed by factor 1 together withtemperature, cloud cover and relative humidity; while 2) the lead-210 specific activity,precipitation and atmospheric pressure are described by factor 2. Although thecommunalities of only two factors are already larger than 0.5 for most of the variables,an introduction of a third factor raises the communalities of all the variables above 0.5.The results imply that the beryllium-7 and lead-210 are under different dominantunderlying mechanisms. The concentration of beryllium-7 seems to be primarilyinfluenced by a mechanism of a regional character which is also a predominant factorfor temperature. This association between the beryllium-7 specific activity andtemperature prevails even when the number of factors in the analysis is raised to threeand four. The lead-210 specific activity, on the other hand, together with precipitationand atmospheric pressure, is under an influence of a local mechanism, but thatrelationship between the variables ceases to hold when the number of factors is raisedto three, and more than 80% of the variance in the Pb-210 specific activity is explainedby one specific factor.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija",
title = "Faktorska analiza specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnom sloju vazduha, i meteoroloških parametara, Factor analysis of the beryllium-7 and lead-210 specific activities in surface air, and meteorological parameters",
pages = "19-27",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2375"
}

Ajtić, J., Sarvan, D., Todorović, D., Rajačić, M., Krneta-Nikolić, J. D., Đurđević, V., Zorko, B., Vodenik, B., Glavič-Cindro, D.,& Kožar Logar, J.. (2017). Faktorska analiza specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnom sloju vazduha, i meteoroloških parametara. in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija
Beograd : Institut za nuklearne nauke "Vinča"., 19-27.
https://hdl.handle.net/21.15107/rcub_veterinar_2375

Ajtić J, Sarvan D, Todorović D, Rajačić M, Krneta-Nikolić JD, Đurđević V, Zorko B, Vodenik B, Glavič-Cindro D, Kožar Logar J. Faktorska analiza specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnom sloju vazduha, i meteoroloških parametara. in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija. 2017;:19-27.
https://hdl.handle.net/21.15107/rcub_veterinar_2375 .

Ajtić, Jelena, Sarvan, Darko, Todorović, Dragana, Rajačić, Milica, Krneta-Nikolić, Jelena D., Đurđević, Vladimir, Zorko, Benjamin, Vodenik, Branko, Glavič-Cindro, Denis, Kožar Logar, Jasmina, "Faktorska analiza specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnom sloju vazduha, i meteoroloških parametara" in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija (2017):19-27,
https://hdl.handle.net/21.15107/rcub_veterinar_2375 .