Samardžić, Selena

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  • Samardžić, Selena (2)
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Proposal and optimization of method for direct determination of the thoron progeny concentrations and thoron equilibrium

Forkapić, Sofija; Lakatoš, Robert; Čeliković, Igor T.; Bikit-Schroeder, Kristina; Mrđa, Dušan; Radolić, Vanja; Samardžić, Selena

(2019)

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  - http://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 . .
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3
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Problem torona i predlog direktne metode određivanja koncentracije toronovih potomaka

Forkapić, Sofija; Lakatoš, Robert; Čeliković, Igor T.; Bikit-Šreder, Kristina; Mrđa, Dušan; Samardžić, Selena

(Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе, 2019)

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  - http://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
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"
}
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.
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..
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.