Thoron emanation and exhalation of Slovenian soils determined by a PIC detector-equipped radon monitor

Jónás, J.; Sas, Z.; Vaupotic, J.; Kocsis, E.; Somlai, J.; Kovács, T.

doi:10.1515/nuka-2016-0063

Artykuł - szczegóły

Tytuł artykułu

Thoron emanation and exhalation of Slovenian soils determined by a PIC detector-equipped radon monitor

Autorzy

Jónás J. , Sas Z. , Vaupotic J. , Kocsis E. , Somlai J. , Kovács T.

Treść / Zawartość

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Identyfikatory

DOI

10.1515/nuka-2016-0063

Warianty tytułu

Konferencja

International Conference „Radon in the Environment” (2nd ; 25-29.05.2015 ; Kraków, Poland)

Języki publikacji

Abstrakty

The health risk from thoron (Rn-220) is usually ignored owing to its short half-life (55.6 s), but the generated thoron decay products can cause a significant dose contribution. In this study, altogether 51 Slovenian soil samples were investigated using an accumulation chamber technique to obtain information about thoron exhalation features. The obtained (massic) thoron exhalation results varied between 6.9 and 149 mBq•kg–1•s–1 (average: 55.2 mBq•kg –1•s–1). The Th-232 content was determined using HPGe gamma spectrometry. The Th-232 activity concentration ranged between 9.3 and 161.7 Bq•kg–1 (average: 64.6 Bq•kg –1). The thoron emanation features were also calculated from the obtained results (2.9 to 21.2% with an average of 8.6%). The thoron exhalation and emanation properties were compared with the radon exhalation and emanation features determined in a previous study. It was found that there was no correlation between the radon and thoron emanation features, according to the obtained data. This can be explained by the different Ra-224 and Ra-226 distributions in the soil grains. As a result, the thoron emanation factor cannot be predicted from radon emanation and vice versa.

Słowa kluczowe

emanation exhalation gamma spectrometry PIC detector soil thorium thoron

Wydawca

Institute of Nuclear Chemistry and Technology

Czasopismo

Nukleonika

Rocznik

2016

Tom

Vol. 61, No. 3

Strony

379--384

Opis fizyczny

Bibliogr. 24 poz., rys.

Twórcy

autor

Jónás J.

Institute of Radiochemistry and Radioecology, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary and Social Organization for Radioecological Cleanliness, József Attila u. 7/a., H-8200, Veszprém, Hungary

autor

Sas Z.

Institute of Radiochemistry and Radioecology, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary, Tel.: +36 88 624 789, Fax: +36 88 624 178

autor

Vaupotic J.

Radon Centre, Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia

autor

Kocsis E.

Institute of Radiochemistry and Radioecology, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary, Tel.: +36 88 624 789, Fax: +36 88 624 178

autor

Somlai J.

Institute of Radiochemistry and Radioecology, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary, Tel.: +36 88 624 789, Fax: +36 88 624 178

autor

Kovács T.

kt@almos.uni-pannon.hu

Institute of Radiochemistry and Radioecology, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary, Tel.: +36 88 624 789, Fax: +36 88 624 178

Bibliografia

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3. Kardos, R., Gregoric, A., Jonas, J., Vaupotic, J., Kovacs, T., & Ishimori, Y. (2015). Dependence of radon emanation of soil on lithology. J. Radioanal. Nucl. Chem., 304, 1321–1327. DOI: 10.1007/s10967-015-3954-3.
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20. Zak, A., Biernacka, M., & Mamont-Ciesla, K. (1993). Investigation of radon and thoron from building walls. Nukleonika, 38(4), 39–50.
21. Kochowska, E., Kozak, K., Kozlowska, B., Mazur, J., & Dorda, J. (2009). Test measurements of thoron concentration using two ionization chambers AlphaGUARD vs. radon monitor RAD7. Nukleonika, 54(3), 189–192.
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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.

Typ dokumentu

Bibliografia

Identyfikator YADDA

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