TY  - CONF
AU  - Kuzmanović, Predrag
AU  - Forkapić, Sofija
AU  - Čeliković, Igor T.
AU  - Mrđa, Dušan
AU  - Bikit, Kristina
AU  - Hansman, Jan
AU  - Knežević Radić, Jovana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11933
AB  - This paper presents the results of gamma spectrometry measurements of natural radionuclides ( 226Ra, 232Th, and 40K) in some floor and wall ceramic tiles produced in Serbia and used in homes and workplaces. The level of radioactivity of some ceramic tiles produced in Serbia by two major manufacturers–Zorka Keramika and Toza Markovic was examined. The measured mean value of the activity concentration of 226Ra, 232Th, and 40K exceeds the average values in the world for building materials with values of 67.2±6.9 Bq kg-1 for 226Ra, 57.4±4.7 Bq kg-1 for 232Th and 808±48 Bq kg-1 for 40K. Based on these calculated values, the representative level index gamma index, associated with gamma radiation, whose average value is 0.78±0.06, and annual effective dose, whose average value is 0.117±0.009 mSv y-1 for home was obtained. Estimated values fulfill all the recommendations of the European Union for building materials, thus analyzed materials are considered not to be a health hazard for the public.
C3  - Proceedings of Science
T1  - Radioactivity Measurements of Ceramic Tiles Produced in Serbia
VL  - 427
SP  - 193246
DO  - 10.22323/1.427.0281
ER  - 

@conference{
author = "Kuzmanović, Predrag and Forkapić, Sofija and Čeliković, Igor T. and Mrđa, Dušan and Bikit, Kristina and Hansman, Jan and Knežević Radić, Jovana",
year = "2023",
abstract = "This paper presents the results of gamma spectrometry measurements of natural radionuclides ( 226Ra, 232Th, and 40K) in some floor and wall ceramic tiles produced in Serbia and used in homes and workplaces. The level of radioactivity of some ceramic tiles produced in Serbia by two major manufacturers–Zorka Keramika and Toza Markovic was examined. The measured mean value of the activity concentration of 226Ra, 232Th, and 40K exceeds the average values in the world for building materials with values of 67.2±6.9 Bq kg-1 for 226Ra, 57.4±4.7 Bq kg-1 for 232Th and 808±48 Bq kg-1 for 40K. Based on these calculated values, the representative level index gamma index, associated with gamma radiation, whose average value is 0.78±0.06, and annual effective dose, whose average value is 0.117±0.009 mSv y-1 for home was obtained. Estimated values fulfill all the recommendations of the European Union for building materials, thus analyzed materials are considered not to be a health hazard for the public.",
journal = "Proceedings of Science",
title = "Radioactivity Measurements of Ceramic Tiles Produced in Serbia",
volume = "427",
pages = "193246",
doi = "10.22323/1.427.0281"
}

Kuzmanović, P., Forkapić, S., Čeliković, I. T., Mrđa, D., Bikit, K., Hansman, J.,& Knežević Radić, J.. (2023). Radioactivity Measurements of Ceramic Tiles Produced in Serbia. in Proceedings of Science, 427, 193246.
https://doi.org/10.22323/1.427.0281

Kuzmanović P, Forkapić S, Čeliković IT, Mrđa D, Bikit K, Hansman J, Knežević Radić J. Radioactivity Measurements of Ceramic Tiles Produced in Serbia. in Proceedings of Science. 2023;427:193246.
doi:10.22323/1.427.0281 .

Kuzmanović, Predrag, Forkapić, Sofija, Čeliković, Igor T., Mrđa, Dušan, Bikit, Kristina, Hansman, Jan, Knežević Radić, Jovana, "Radioactivity Measurements of Ceramic Tiles Produced in Serbia" in Proceedings of Science, 427 (2023):193246,
https://doi.org/10.22323/1.427.0281 . .

TY  - CONF
AU  - Kuzmanović, Predrag
AU  - Čeliković, Igor T.
AU  - Forkapić, Sofija
AU  - Todorović, Nataša
AU  - Filipović Petrović, Leposava
AU  - Mrđa, Dušan
AU  - Knežević, Jovana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11128
AB  - Phosphogypsum is a waste that is generated in the production of fertilizers and is very similar to the natural gypsum, thus its use in the construction industry is possible. It usually contains an increased concentration of 226Ra in its composition. The paper presents the results of measuring the radon emanation coefficients for phosphogypsum, natural gypsum and a mixture of natural gypsum and phosphogypsum (50%), that could be potentially used for the production of gypsum boards that are widely applied in construction. Using the method of gamma spectrometry the concentration of 226Ra in the samples was determined, while the concentration of emanated radon from the samples was measured in the specially constructed chambers of different volumes (1.5 l, 2.5 l, 4.25 l, and 30 l), using active radon monitors RAD7 (Durridge Company) and RTM1688-2 (Sarad GmbH). Radon emanation measurements were performed for about 100 cycles of 1 h, after which the emanation curve was fit and the equilibrium concentration of radon activity after one month was theoretically estimated. The effect of chamber volumes on the obtained values of the radon emanation coefficient was investigated. On the basis of the obtained emanation coefficients, it is concluded that these values are strongly dependent on the volume of the measuring chamber and that they increase with expanding the chamber volume. Therefore, it is recommended to use larger volumes of measuring chambers when determining the emanation coefficient for phosphogypsum or natural gypsum. In this way, the real conditions in rooms that are potentially constructed of such materials are better represented, while at the same time the existing effect is neglected.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
T1  - Determination of radon emanation for phosphogypsum produced in Serbia
SP  - 199
DO  - 10.21175/rad.abstr.book.2021.28.21
ER  - 

@conference{
author = "Kuzmanović, Predrag and Čeliković, Igor T. and Forkapić, Sofija and Todorović, Nataša and Filipović Petrović, Leposava and Mrđa, Dušan and Knežević, Jovana",
year = "2021",
abstract = "Phosphogypsum is a waste that is generated in the production of fertilizers and is very similar to the natural gypsum, thus its use in the construction industry is possible. It usually contains an increased concentration of 226Ra in its composition. The paper presents the results of measuring the radon emanation coefficients for phosphogypsum, natural gypsum and a mixture of natural gypsum and phosphogypsum (50%), that could be potentially used for the production of gypsum boards that are widely applied in construction. Using the method of gamma spectrometry the concentration of 226Ra in the samples was determined, while the concentration of emanated radon from the samples was measured in the specially constructed chambers of different volumes (1.5 l, 2.5 l, 4.25 l, and 30 l), using active radon monitors RAD7 (Durridge Company) and RTM1688-2 (Sarad GmbH). Radon emanation measurements were performed for about 100 cycles of 1 h, after which the emanation curve was fit and the equilibrium concentration of radon activity after one month was theoretically estimated. The effect of chamber volumes on the obtained values of the radon emanation coefficient was investigated. On the basis of the obtained emanation coefficients, it is concluded that these values are strongly dependent on the volume of the measuring chamber and that they increase with expanding the chamber volume. Therefore, it is recommended to use larger volumes of measuring chambers when determining the emanation coefficient for phosphogypsum or natural gypsum. In this way, the real conditions in rooms that are potentially constructed of such materials are better represented, while at the same time the existing effect is neglected.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro",
title = "Determination of radon emanation for phosphogypsum produced in Serbia",
pages = "199",
doi = "10.21175/rad.abstr.book.2021.28.21"
}

Kuzmanović, P., Čeliković, I. T., Forkapić, S., Todorović, N., Filipović Petrović, L., Mrđa, D.,& Knežević, J.. (2021). Determination of radon emanation for phosphogypsum produced in Serbia. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 199.
https://doi.org/10.21175/rad.abstr.book.2021.28.21

Kuzmanović P, Čeliković IT, Forkapić S, Todorović N, Filipović Petrović L, Mrđa D, Knežević J. Determination of radon emanation for phosphogypsum produced in Serbia. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro. 2021;:199.
doi:10.21175/rad.abstr.book.2021.28.21 .

Kuzmanović, Predrag, Čeliković, Igor T., Forkapić, Sofija, Todorović, Nataša, Filipović Petrović, Leposava, Mrđa, Dušan, Knežević, Jovana, "Determination of radon emanation for phosphogypsum produced in Serbia" in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro (2021):199,
https://doi.org/10.21175/rad.abstr.book.2021.28.21 . .

TY  - CONF
AU  - Forkapić, Sofija
AU  - Lakatoš, Robert
AU  - Čeliković, Igor T.
AU  - Bikit-Šreder, Kristina
AU  - Mrđa, Dušan
AU  - Samardžić, Selena
PY  - 2019
UR  - https://plus.sr.cobiss.net/opac7/bib/279687436
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8700
AB  - Nedavne  studije  koje  se  bave  problemom  torona  pokazuju  da  toron  u  vazduhu zatvorenih prostorija dominantno potiče od upotrebljenih građevinskih materijala za izradu i pokrivanje zidova i podova i da koncentracija torona eksponencijalno opada sa rastojanjem od površine zidova. Međutim, usled dužeg perioda poluraspada, toronovi potomci 212Pb i 212Bi imaju homogenu prostornu distribuciju i mogu značajno doprineti bronhijalnoj dozi. U ovom radu je razvijena metoda direktnog određivanja koncentracije toronovih potomaka u vazduhu koja se zasniva na gama-spektrometrijskim merenjima filter papira uz detaljnu analizu i optimizaciju vremena usisavanja, hlađenja i merenja na HPGe detektorskim sistemima. Metoda je validovana kroz uporedna merenja sa aktivnim monitorom koji se najčešće koristi za merenje ravnotežne ekvivalentne koncentracije torona. Ovakav način ispitivanja toronske ravnoteže će doprineti preciznom određivanju doze koju primi stanovništvo od inhalacije torona i potomaka, naročito zbog poznate problematike mogućnosti merenja torona kao kratkoživećeg radionuklida. Rezultati preliminarnog istraživanja problema torona u petnaest odabranih kuća pokazuju da su procenjene doze od udisanja torona uporedive sa dozama koje stanovništvo primi od udisanja radona i da toron mora biti obuhvaćen u budućim monitorinzima radona.
AB  - Recentstudies focused on thoron have shown that indoor thoron originates mainly from building materials and that thoron concentrations exponentially decrease with a distance from a wall surface. However, due to longer half-lives of thoron progenies, 212Pb and 212Bi, which are mainly responsible for the bronchial dose, it is expected that their spatial distribution is homogeneous. In this paper, we have developed and optimized a method for direct measurement of thoron progenies concentrations based on an air filtration followed by gamma spectrometry measurements. The method is validated through comparative measurements with an active monitor, which is most often used to measure the equilibrium equivalentthoron concentration. The results of the preliminary study of the thoron problem in fifteen selected homes show that the estimated doses frominhalation of thoron progeniesare comparable with the doses that the population receives from radon inhalation and that the thoron must be included in future radon monitoring.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 30. симпозијум ДЗЗСЦГ : зборник радова
T1  - Problem torona i predlog direktne metode određivanja koncentracije toronovih potomaka
T1  - Thoron problem and proposal of method for direct determination of the thoron progeny concentrations
SP  - 208
EP  - 214
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8700
ER  - 

@conference{
author = "Forkapić, Sofija and Lakatoš, Robert and Čeliković, Igor T. and Bikit-Šreder, Kristina and Mrđa, Dušan and Samardžić, Selena",
year = "2019",
abstract = "Nedavne  studije  koje  se  bave  problemom  torona  pokazuju  da  toron  u  vazduhu zatvorenih prostorija dominantno potiče od upotrebljenih građevinskih materijala za izradu i pokrivanje zidova i podova i da koncentracija torona eksponencijalno opada sa rastojanjem od površine zidova. Međutim, usled dužeg perioda poluraspada, toronovi potomci 212Pb i 212Bi imaju homogenu prostornu distribuciju i mogu značajno doprineti bronhijalnoj dozi. U ovom radu je razvijena metoda direktnog određivanja koncentracije toronovih potomaka u vazduhu koja se zasniva na gama-spektrometrijskim merenjima filter papira uz detaljnu analizu i optimizaciju vremena usisavanja, hlađenja i merenja na HPGe detektorskim sistemima. Metoda je validovana kroz uporedna merenja sa aktivnim monitorom koji se najčešće koristi za merenje ravnotežne ekvivalentne koncentracije torona. Ovakav način ispitivanja toronske ravnoteže će doprineti preciznom određivanju doze koju primi stanovništvo od inhalacije torona i potomaka, naročito zbog poznate problematike mogućnosti merenja torona kao kratkoživećeg radionuklida. Rezultati preliminarnog istraživanja problema torona u petnaest odabranih kuća pokazuju da su procenjene doze od udisanja torona uporedive sa dozama koje stanovništvo primi od udisanja radona i da toron mora biti obuhvaćen u budućim monitorinzima radona., Recentstudies focused on thoron have shown that indoor thoron originates mainly from building materials and that thoron concentrations exponentially decrease with a distance from a wall surface. However, due to longer half-lives of thoron progenies, 212Pb and 212Bi, which are mainly responsible for the bronchial dose, it is expected that their spatial distribution is homogeneous. In this paper, we have developed and optimized a method for direct measurement of thoron progenies concentrations based on an air filtration followed by gamma spectrometry measurements. The method is validated through comparative measurements with an active monitor, which is most often used to measure the equilibrium equivalentthoron concentration. The results of the preliminary study of the thoron problem in fifteen selected homes show that the estimated doses frominhalation of thoron progeniesare comparable with the doses that the population receives from radon inhalation and that the thoron must be included in future radon monitoring.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "30. симпозијум ДЗЗСЦГ : зборник радова",
title = "Problem torona i predlog direktne metode određivanja koncentracije toronovih potomaka, Thoron problem and proposal of method for direct determination of the thoron progeny concentrations",
pages = "208-214",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8700"
}

Forkapić, S., Lakatoš, R., Čeliković, I. T., Bikit-Šreder, K., Mrđa, D.,& Samardžić, S.. (2019). Problem torona i predlog direktne metode određivanja koncentracije toronovih potomaka. in 30. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 208-214.
https://hdl.handle.net/21.15107/rcub_vinar_8700

Forkapić S, Lakatoš R, Čeliković IT, Bikit-Šreder K, Mrđa D, Samardžić S. Problem torona i predlog direktne metode određivanja koncentracije toronovih potomaka. in 30. симпозијум ДЗЗСЦГ : зборник радова. 2019;:208-214.
https://hdl.handle.net/21.15107/rcub_vinar_8700 .

Forkapić, Sofija, Lakatoš, Robert, Čeliković, Igor T., Bikit-Šreder, Kristina, Mrđa, Dušan, Samardžić, Selena, "Problem torona i predlog direktne metode određivanja koncentracije toronovih potomaka" in 30. симпозијум ДЗЗСЦГ : зборник радова (2019):208-214,
https://hdl.handle.net/21.15107/rcub_vinar_8700 .

TY  - JOUR
AU  - Forkapić, Sofija
AU  - Lakatoš, Robert
AU  - Čeliković, Igor T.
AU  - Bikit-Schroeder, Kristina
AU  - Mrđa, Dušan
AU  - Radolić, Vanja
AU  - Samardžić, Selena
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0969806X18315032
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8092
AB  - Most studies focused on thoron have shown that indoor thoron originates mainly from building materials and that thoron concentrations exponentially decrease with a distance from a wall surface. On the contrary, due to longer half-lives of thoron progenies, 212 Pb and 212 Bi, which are mainly responsible for the bronchial dose, it is expected that their spatial distribution is homogeneous. Therefore, direct measurements of thoron progeny concentrations or direct thoron measurement and determination of thoron equilibrium factor are necessary for accurate dose assessment. In this paper, we have optimized and validated a reliable and inexpensive method for direct measurement of thoron progenies concentrations based on an air filtration followed by gamma spectrometry measurements. With simultaneous measurements of indoor thoron by the RAD7 active device, the equilibrium factor for thoron in 15 different investigated dwellings was estimated. Obtained results for the equilibrium equivalent thoron concentrations in the range from 0.277 Bq/m 3 to 11.34 Bq/m 3 and thoron equilibrium factor in the range from 0.0047 to 0.098 with arithmetic mean value of 0.034 are in good agreement with already published results. © 2019 Elsevier Ltd
T2  - Radiation Physics and Chemistry
T1  - Proposal and optimization of method for direct determination of the thoron progeny concentrations and thoron equilibrium
VL  - 159
SP  - 57
EP  - 63
DO  - 10.1016/j.radphyschem.2019.02.043
ER  - 

@article{
author = "Forkapić, Sofija and Lakatoš, Robert and Čeliković, Igor T. and Bikit-Schroeder, Kristina and Mrđa, Dušan and Radolić, Vanja and Samardžić, Selena",
year = "2019",
abstract = "Most studies focused on thoron have shown that indoor thoron originates mainly from building materials and that thoron concentrations exponentially decrease with a distance from a wall surface. On the contrary, due to longer half-lives of thoron progenies, 212 Pb and 212 Bi, which are mainly responsible for the bronchial dose, it is expected that their spatial distribution is homogeneous. Therefore, direct measurements of thoron progeny concentrations or direct thoron measurement and determination of thoron equilibrium factor are necessary for accurate dose assessment. In this paper, we have optimized and validated a reliable and inexpensive method for direct measurement of thoron progenies concentrations based on an air filtration followed by gamma spectrometry measurements. With simultaneous measurements of indoor thoron by the RAD7 active device, the equilibrium factor for thoron in 15 different investigated dwellings was estimated. Obtained results for the equilibrium equivalent thoron concentrations in the range from 0.277 Bq/m 3 to 11.34 Bq/m 3 and thoron equilibrium factor in the range from 0.0047 to 0.098 with arithmetic mean value of 0.034 are in good agreement with already published results. © 2019 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "Proposal and optimization of method for direct determination of the thoron progeny concentrations and thoron equilibrium",
volume = "159",
pages = "57-63",
doi = "10.1016/j.radphyschem.2019.02.043"
}

Forkapić, S., Lakatoš, R., Čeliković, I. T., Bikit-Schroeder, K., Mrđa, D., Radolić, V.,& Samardžić, S.. (2019). Proposal and optimization of method for direct determination of the thoron progeny concentrations and thoron equilibrium. in Radiation Physics and Chemistry, 159, 57-63.
https://doi.org/10.1016/j.radphyschem.2019.02.043

Forkapić S, Lakatoš R, Čeliković IT, Bikit-Schroeder K, Mrđa D, Radolić V, Samardžić S. Proposal and optimization of method for direct determination of the thoron progeny concentrations and thoron equilibrium. in Radiation Physics and Chemistry. 2019;159:57-63.
doi:10.1016/j.radphyschem.2019.02.043 .

Forkapić, Sofija, Lakatoš, Robert, Čeliković, Igor T., Bikit-Schroeder, Kristina, Mrđa, Dušan, Radolić, Vanja, Samardžić, Selena, "Proposal and optimization of method for direct determination of the thoron progeny concentrations and thoron equilibrium" in Radiation Physics and Chemistry, 159 (2019):57-63,
https://doi.org/10.1016/j.radphyschem.2019.02.043 . .

TY  - CONF
AU  - Forkapić, Sofija
AU  - Lakatoš, Robert
AU  - Bikit-Šreder, Kristina
AU  - Čeliković, Igor T.
AU  - Repić, Predrag
AU  - Mrđa, Dušan
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11189
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2018 : 6th International Conference on Radiation in Various Fields of Research : book of abstracts; June 18-22, 2018; Ohrid, Macedonia
T1  - The comprehensive radon survey in single-family houses in Vojvodina region
SP  - 213
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11189
ER  - 

@conference{
author = "Forkapić, Sofija and Lakatoš, Robert and Bikit-Šreder, Kristina and Čeliković, Igor T. and Repić, Predrag and Mrđa, Dušan",
year = "2018",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2018 : 6th International Conference on Radiation in Various Fields of Research : book of abstracts; June 18-22, 2018; Ohrid, Macedonia",
title = "The comprehensive radon survey in single-family houses in Vojvodina region",
pages = "213",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11189"
}

Forkapić, S., Lakatoš, R., Bikit-Šreder, K., Čeliković, I. T., Repić, P.,& Mrđa, D.. (2018). The comprehensive radon survey in single-family houses in Vojvodina region. in RAD 2018 : 6th International Conference on Radiation in Various Fields of Research : book of abstracts; June 18-22, 2018; Ohrid, Macedonia
RAD Centre, Niš, Serbia., 213.
https://hdl.handle.net/21.15107/rcub_vinar_11189

Forkapić S, Lakatoš R, Bikit-Šreder K, Čeliković IT, Repić P, Mrđa D. The comprehensive radon survey in single-family houses in Vojvodina region. in RAD 2018 : 6th International Conference on Radiation in Various Fields of Research : book of abstracts; June 18-22, 2018; Ohrid, Macedonia. 2018;:213.
https://hdl.handle.net/21.15107/rcub_vinar_11189 .

Forkapić, Sofija, Lakatoš, Robert, Bikit-Šreder, Kristina, Čeliković, Igor T., Repić, Predrag, Mrđa, Dušan, "The comprehensive radon survey in single-family houses in Vojvodina region" in RAD 2018 : 6th International Conference on Radiation in Various Fields of Research : book of abstracts; June 18-22, 2018; Ohrid, Macedonia (2018):213,
https://hdl.handle.net/21.15107/rcub_vinar_11189 .

TY  - CONF
AU  - Forkapić, Sofija
AU  - Maletić, Dimitrije
AU  - Vasin, Jovica
AU  - Bikit, Kristina
AU  - Mrđa, Dušan
AU  - Bikit, Ištvan S.
AU  - Udovičić, Vladimir
AU  - Banjanac, Radomir
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8276
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  - Geogeni radonski potencijal koji izdvaja radon u podzemnim slojevima kao dominantan
uzrok akumulacije radona u zatvorenim prostorijama i koji je nezavisan od ljudskog
uticaja i vremenski konstantan u geološkim okvirima predstavlja glavni alat za
iznalaženje radonom ugroženih područja. U nedostatku podataka za permeabilnost
zemljišta za radon i malog broja merenja radona u zemljištu, upotrebljena je
multivarijantna analiza velikog broja raspoloživih geohemijskih podataka, merenja
radioaktivnosti zemljišta i koncentracija aktivnosti radona u zatvorenim prostorijama
datih lokacija na području Vojvodine. Nekoliko uporedivih metoda iz ROOT okvira za
analize softverskog paketa TMVA je korišćeno za analizu zavisnosti koncentracije
radona u zatvorenom od mnoštva ulaznih varijabli. BDTG kao najpodobnija metoda je
pokazala da su varijable sa najvećim uticajem na koncentraciju radona u zatvorenim
prostorijama pored sadržaja ukupnog azota, koncentracije aktivnosti radionuklida u
zemljištu na profilu dubine od 30 cm i sadržaj humusa i gline. Dobijeni rezultati
pokazuju dobro slaganje sa nedavnim ispitivanjem emanacije radona iz zemljišta na
području grada Novog Sada.
AB  - The most dominant source of indoor radon is the underlying soil, so the enhanced levels
of radon are usually expected in mountain regions and geology units with high radium
and uranium content in surface soils. Laboratory for radioactivity and dose
measurement, Faculty of Sciences, University of Novi Sad has rich databases of natural
radionuclides concentrations in Vojvodina soil and also of indoor radon concentrations
for the region of Vojvodina, Northern Province of Serbia. In this paper, we present the
results of correlative and multivariate analysis of these results and geochemical
characteristics of soil in order to estimate the geogenic radon potential. The correlative
and multivariate analysis were done using Toolkit for Multivariate Analysis software
package TMVA package, which uses several comparable multivariate methods for our
analysis. The evaluation ranking results based on the best signal efficiency and purity,
show that the Boosted Decision Trees (BDT) and Multi Layer Preceptor (MLP), based
on Artificial Neural Network (ANN), are multivariate methods which give the best
results in the analysis. The BDTG multivariate method shows that variables with the
highest importance are radio-nuclides activity on 30 cm depth. Moreover, the
multivariate regression methods give a good approximation of radon activity using full
set of input variables
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Korišćenje multivarijantne analize za predviđanje geogenog radonskog potencijala
T1  - Multivariate analysis application for geogeny radon potential prediction
SP  - 210
EP  - 218
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8276
ER  - 

@conference{
author = "Forkapić, Sofija and Maletić, Dimitrije and Vasin, Jovica and Bikit, Kristina and Mrđa, Dušan and Bikit, Ištvan S. and Udovičić, Vladimir and Banjanac, Radomir",
year = "2017",
abstract = "Geogeni radonski potencijal koji izdvaja radon u podzemnim slojevima kao dominantan
uzrok akumulacije radona u zatvorenim prostorijama i koji je nezavisan od ljudskog
uticaja i vremenski konstantan u geološkim okvirima predstavlja glavni alat za
iznalaženje radonom ugroženih područja. U nedostatku podataka za permeabilnost
zemljišta za radon i malog broja merenja radona u zemljištu, upotrebljena je
multivarijantna analiza velikog broja raspoloživih geohemijskih podataka, merenja
radioaktivnosti zemljišta i koncentracija aktivnosti radona u zatvorenim prostorijama
datih lokacija na području Vojvodine. Nekoliko uporedivih metoda iz ROOT okvira za
analize softverskog paketa TMVA je korišćeno za analizu zavisnosti koncentracije
radona u zatvorenom od mnoštva ulaznih varijabli. BDTG kao najpodobnija metoda je
pokazala da su varijable sa najvećim uticajem na koncentraciju radona u zatvorenim
prostorijama pored sadržaja ukupnog azota, koncentracije aktivnosti radionuklida u
zemljištu na profilu dubine od 30 cm i sadržaj humusa i gline. Dobijeni rezultati
pokazuju dobro slaganje sa nedavnim ispitivanjem emanacije radona iz zemljišta na
području grada Novog Sada., The most dominant source of indoor radon is the underlying soil, so the enhanced levels
of radon are usually expected in mountain regions and geology units with high radium
and uranium content in surface soils. Laboratory for radioactivity and dose
measurement, Faculty of Sciences, University of Novi Sad has rich databases of natural
radionuclides concentrations in Vojvodina soil and also of indoor radon concentrations
for the region of Vojvodina, Northern Province of Serbia. In this paper, we present the
results of correlative and multivariate analysis of these results and geochemical
characteristics of soil in order to estimate the geogenic radon potential. The correlative
and multivariate analysis were done using Toolkit for Multivariate Analysis software
package TMVA package, which uses several comparable multivariate methods for our
analysis. The evaluation ranking results based on the best signal efficiency and purity,
show that the Boosted Decision Trees (BDT) and Multi Layer Preceptor (MLP), based
on Artificial Neural Network (ANN), are multivariate methods which give the best
results in the analysis. The BDTG multivariate method shows that variables with the
highest importance are radio-nuclides activity on 30 cm depth. Moreover, the
multivariate regression methods give a good approximation of radon activity using full
set of input variables",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Korišćenje multivarijantne analize za predviđanje geogenog radonskog potencijala, Multivariate analysis application for geogeny radon potential prediction",
pages = "210-218",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8276"
}

Forkapić, S., Maletić, D., Vasin, J., Bikit, K., Mrđa, D., Bikit, I. S., Udovičić, V.,& Banjanac, R.. (2017). Korišćenje multivarijantne analize za predviđanje geogenog radonskog potencijala. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 210-218.
https://hdl.handle.net/21.15107/rcub_vinar_8276

Forkapić S, Maletić D, Vasin J, Bikit K, Mrđa D, Bikit IS, Udovičić V, Banjanac R. Korišćenje multivarijantne analize za predviđanje geogenog radonskog potencijala. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:210-218.
https://hdl.handle.net/21.15107/rcub_vinar_8276 .

Forkapić, Sofija, Maletić, Dimitrije, Vasin, Jovica, Bikit, Kristina, Mrđa, Dušan, Bikit, Ištvan S., Udovičić, Vladimir, Banjanac, Radomir, "Korišćenje multivarijantne analize za predviđanje geogenog radonskog potencijala" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):210-218,
https://hdl.handle.net/21.15107/rcub_vinar_8276 .

TY  - CONF
AU  - Forkapić, Sofija
AU  - Vasin, Jovica
AU  - Bikit, Ištvan S.
AU  - Mrđa, Dušan
AU  - Bikit, Kristina
AU  - Milić, Stanko
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8275
UR  - https://plus.sr.cobiss.net/opac7/bib/245691404
UR  - http://dzz.org.rs/wp-content/uploads/2013/06/Zbornik_XXIX_Simpozijum_DZZ_SCG_Srebrno_jezero_2.pdf
AB  - U ovom rаdu prikazani su rezultati istraživanja moguće korelаcije geohemijskih
kаrаkteristikа zemljišta i sadržaja prirodnih rаdionuklida 238U, 226Ra, 232Th i 40K, kаo i
radionuklida antropogenog porekla 137Cs u svim geomorfološkim jedinicama zemljišta
na području Vojvodine. Tokom 2001. godine izvršen je detaljan monitoring
radioaktivnosti zemljišta na 50 odabranih lokacija prema tipu zemljišta sa analizom
mehaničkog sastava zemljišta i sadržaja humusa i pristupačnog fosfora i kalijuma.
Kako bi se ispitao potencijаlni uticаj obrаde poljoprivrednog zemljišta i vremenskih
uslovа nа migrаciju i distribuciju rаdionuklidа prisutnih u zemljištu, monitoring
zemljišta je na istim lokacijama ponovljen 2010. godine. Glavni zaključak ovih
istraživanja je da izmerene maksimalne koncentracije aktivnosti radionuklida: 238U (87
Bq/kg), 226Ra (44,7 Bq/kg), 232Th (55,5 Bq/kg) i 137Cs (29 Bq/kg) u profilu zemljišta
dubine 30 cm ne ugrožavaju bezbednost proizvodnje hrane na ovom zemljištu. Utvrđena
je najveća zavisnost koncentracije aktivnosti kalijuma 40K od sadržaja gline u
poljoprivrednom zemljištu.
AB  - In this paper, we performed, for the first time, detailed study of Vojvodina’s soil in
order to explore possible correlations of soil geochemical characteristics and
radionuclide activity concentrations. The aim of this study is to analyze the content of
natural radioisotopes 238U, 226Ra, 232Th and 40K, as well as artificial radioisotope 137Cs
in all soil types originated from the same parent material – loess. The sampling
locations were selected so that they are proportionately represented all
geomorphological units: two mountains, four loess plateaus, three loess terraces, four
alluvial plains, two sandstone terrains. The process of genesis of soil and cultivation
mode plays a dominant role on the characteristics of the soil. However intensive
agricultural production and the use of high mineral fertilizers have caused that the
same type of soil contains different concentrations of available phosphorus and
radionuclides. Comparison of activity concentrations between different types of soil
confirmed that the presence of clay mostly contributes to radionuclides content in the
soil. The main conclusion is that measured maximal activity concentrations for 238U (87
Bq/kg), 226Ra (44.7 Bq/kg), 232Th (55.5 Bq/kg) and 137Cs (29 Bq/kg) at 30 cm depth
could not endanger the safety of food production.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Istraživanje korelacija sadržaja radionuklida i geohemijskih karakteristika zemljišta Vojvodine
T1  - Investigations of possible correlations between radionuclides content and geochemical characteristics of Vojvodina soil
SP  - 200
EP  - 209
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8275
ER  - 

@conference{
author = "Forkapić, Sofija and Vasin, Jovica and Bikit, Ištvan S. and Mrđa, Dušan and Bikit, Kristina and Milić, Stanko",
year = "2017",
abstract = "U ovom rаdu prikazani su rezultati istraživanja moguće korelаcije geohemijskih
kаrаkteristikа zemljišta i sadržaja prirodnih rаdionuklida 238U, 226Ra, 232Th i 40K, kаo i
radionuklida antropogenog porekla 137Cs u svim geomorfološkim jedinicama zemljišta
na području Vojvodine. Tokom 2001. godine izvršen je detaljan monitoring
radioaktivnosti zemljišta na 50 odabranih lokacija prema tipu zemljišta sa analizom
mehaničkog sastava zemljišta i sadržaja humusa i pristupačnog fosfora i kalijuma.
Kako bi se ispitao potencijаlni uticаj obrаde poljoprivrednog zemljišta i vremenskih
uslovа nа migrаciju i distribuciju rаdionuklidа prisutnih u zemljištu, monitoring
zemljišta je na istim lokacijama ponovljen 2010. godine. Glavni zaključak ovih
istraživanja je da izmerene maksimalne koncentracije aktivnosti radionuklida: 238U (87
Bq/kg), 226Ra (44,7 Bq/kg), 232Th (55,5 Bq/kg) i 137Cs (29 Bq/kg) u profilu zemljišta
dubine 30 cm ne ugrožavaju bezbednost proizvodnje hrane na ovom zemljištu. Utvrđena
je najveća zavisnost koncentracije aktivnosti kalijuma 40K od sadržaja gline u
poljoprivrednom zemljištu., In this paper, we performed, for the first time, detailed study of Vojvodina’s soil in
order to explore possible correlations of soil geochemical characteristics and
radionuclide activity concentrations. The aim of this study is to analyze the content of
natural radioisotopes 238U, 226Ra, 232Th and 40K, as well as artificial radioisotope 137Cs
in all soil types originated from the same parent material – loess. The sampling
locations were selected so that they are proportionately represented all
geomorphological units: two mountains, four loess plateaus, three loess terraces, four
alluvial plains, two sandstone terrains. The process of genesis of soil and cultivation
mode plays a dominant role on the characteristics of the soil. However intensive
agricultural production and the use of high mineral fertilizers have caused that the
same type of soil contains different concentrations of available phosphorus and
radionuclides. Comparison of activity concentrations between different types of soil
confirmed that the presence of clay mostly contributes to radionuclides content in the
soil. The main conclusion is that measured maximal activity concentrations for 238U (87
Bq/kg), 226Ra (44.7 Bq/kg), 232Th (55.5 Bq/kg) and 137Cs (29 Bq/kg) at 30 cm depth
could not endanger the safety of food production.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Istraživanje korelacija sadržaja radionuklida i geohemijskih karakteristika zemljišta Vojvodine, Investigations of possible correlations between radionuclides content and geochemical characteristics of Vojvodina soil",
pages = "200-209",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8275"
}

Forkapić, S., Vasin, J., Bikit, I. S., Mrđa, D., Bikit, K.,& Milić, S.. (2017). Istraživanje korelacija sadržaja radionuklida i geohemijskih karakteristika zemljišta Vojvodine. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 200-209.
https://hdl.handle.net/21.15107/rcub_vinar_8275

Forkapić S, Vasin J, Bikit IS, Mrđa D, Bikit K, Milić S. Istraživanje korelacija sadržaja radionuklida i geohemijskih karakteristika zemljišta Vojvodine. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:200-209.
https://hdl.handle.net/21.15107/rcub_vinar_8275 .

Forkapić, Sofija, Vasin, Jovica, Bikit, Ištvan S., Mrđa, Dušan, Bikit, Kristina, Milić, Stanko, "Istraživanje korelacija sadržaja radionuklida i geohemijskih karakteristika zemljišta Vojvodine" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):200-209,
https://hdl.handle.net/21.15107/rcub_vinar_8275 .

TY  - CONF
AU  - Mrđa, Dušan
AU  - Bikit, Kristina
AU  - Forkapić, Sofija
AU  - Bikit, Ištvan S.
AU  - Slivka, Jaroslav
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8318
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  - Kako bi se dobile krive efikasnosti detekcije za In-situ merenja gama zračenja poreklom
iz zemljišta, potrebno je izvršiti odgovarajuće Monte-Karlo simulacije. U simulacijama
je korišćena gustina zemljišta od 1,046 g/cm3
, dok je elementalni sastav zemljišta u
kojem se generiše gama zračenje bio: O - 47%, Si - 35%, Al - 8%, Fe – 3,9%, C – 2,1%,
Ca – 1,4%, K – 1,3%, N – 0,6%, Mg – 0,6%, N – 0,1%. Matrica zemljišta je predstavljena cilindričnom zapreminom prečnika 1,5 m i debljine 0,5 m, iznad koje je na visini
od 1 m postavljen germanijumski detektor. Razmatrane su homogene distribucije različitih radionuklida (Ra-226, Th-232, K-40) u matrici zemljišta. U simulacijama su
dobijeni i analizirani odgovarajući gama spektri, koji uz podatke o simuliranim efikasnostima detekcije, omogućuju poređenje sa realnim eksperimentalnim merenjima i
praktičnu primenu simulacionih rezultata.
AB  - In this work, the Monte-Carlo simulations for In-Situ gamma spectrometry of soil were
performed. The simulated gamma spectrum, originated from K-40, as well as from
members of Th-232 chain, and daughters of Ra-226, was obtained. We obtained the
corresponding detection efficiency curve for HPGe detector, which can be applied for
In-Situ measurement of radionuclide concentration in soil, assuming uniform
radionuclide distribution.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 29. симпозијум ДЗЗСЦГ : зборник радова
T1  - Primena Monte-Karlo simulacija za in-situ gama spektrometriju
T1  - Applying of Monte-Carlo simulations for in-situ gamma spectrometry
SP  - 477
EP  - 481
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8318
ER  - 

@conference{
author = "Mrđa, Dušan and Bikit, Kristina and Forkapić, Sofija and Bikit, Ištvan S. and Slivka, Jaroslav",
year = "2017",
abstract = "Kako bi se dobile krive efikasnosti detekcije za In-situ merenja gama zračenja poreklom
iz zemljišta, potrebno je izvršiti odgovarajuće Monte-Karlo simulacije. U simulacijama
je korišćena gustina zemljišta od 1,046 g/cm3
, dok je elementalni sastav zemljišta u
kojem se generiše gama zračenje bio: O - 47%, Si - 35%, Al - 8%, Fe – 3,9%, C – 2,1%,
Ca – 1,4%, K – 1,3%, N – 0,6%, Mg – 0,6%, N – 0,1%. Matrica zemljišta je predstavljena cilindričnom zapreminom prečnika 1,5 m i debljine 0,5 m, iznad koje je na visini
od 1 m postavljen germanijumski detektor. Razmatrane su homogene distribucije različitih radionuklida (Ra-226, Th-232, K-40) u matrici zemljišta. U simulacijama su
dobijeni i analizirani odgovarajući gama spektri, koji uz podatke o simuliranim efikasnostima detekcije, omogućuju poređenje sa realnim eksperimentalnim merenjima i
praktičnu primenu simulacionih rezultata., In this work, the Monte-Carlo simulations for In-Situ gamma spectrometry of soil were
performed. The simulated gamma spectrum, originated from K-40, as well as from
members of Th-232 chain, and daughters of Ra-226, was obtained. We obtained the
corresponding detection efficiency curve for HPGe detector, which can be applied for
In-Situ measurement of radionuclide concentration in soil, assuming uniform
radionuclide distribution.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "29. симпозијум ДЗЗСЦГ : зборник радова",
title = "Primena Monte-Karlo simulacija za in-situ gama spektrometriju, Applying of Monte-Carlo simulations for in-situ gamma spectrometry",
pages = "477-481",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8318"
}

Mrđa, D., Bikit, K., Forkapić, S., Bikit, I. S.,& Slivka, J.. (2017). Primena Monte-Karlo simulacija za in-situ gama spektrometriju. in 29. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 477-481.
https://hdl.handle.net/21.15107/rcub_vinar_8318

Mrđa D, Bikit K, Forkapić S, Bikit IS, Slivka J. Primena Monte-Karlo simulacija za in-situ gama spektrometriju. in 29. симпозијум ДЗЗСЦГ : зборник радова. 2017;:477-481.
https://hdl.handle.net/21.15107/rcub_vinar_8318 .

Mrđa, Dušan, Bikit, Kristina, Forkapić, Sofija, Bikit, Ištvan S., Slivka, Jaroslav, "Primena Monte-Karlo simulacija za in-situ gama spektrometriju" in 29. симпозијум ДЗЗСЦГ : зборник радова (2017):477-481,
https://hdl.handle.net/21.15107/rcub_vinar_8318 .