Determination of Natural Radioactivity in Soil Samples around Gold Mining Area in Khamkeut District, Bolikhamxay Province,Laos Using Gamma Ray Spectrometer with NaI (Tl) Detector

Somsavath Leuangtakoun, Bui Thi Hong, Bui Van Loat, Phan Viet Cuong

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Published Sep 5, 2018
DOI: https://doi.org/10.25073/2588-1124/vnumap.4270

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How to Cite
LEUANGTAKOUN, Somsavath et al. Determination of Natural Radioactivity in Soil Samples around Gold Mining Area in Khamkeut District, Bolikhamxay Province,Laos Using Gamma Ray Spectrometer with NaI (Tl) Detector. VNU Journal of Science: Mathematics - Physics, [S.l.], v. 34, n. 3, sep. 2018. ISSN 2588-1124. Available at: <https://js.vnu.edu.vn/MaP/article/view/4270>. Date accessed: 27 apr. 2024. doi: https://doi.org/10.25073/2588-1124/vnumap.4270.
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Issue
Vol 34 No 3
Section
Review Article

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Abstract

This paper presented the method of determining the radioactivity of 40K, 226Ra and 232Th in soil samples by gamma-ray spectrometer using NaI (Tl) scintillation detector. The radioactivity of each isotope is calculated based on the net count rate in the energy window characteristic for the 40K, 226Ra and 232Th radioisotopes respectively. We have determined  activity concentrations of the natural radionuclides 226Ra,232Th and 40K in 15 soil samples collected around gold mines of Khamkeut district, Bolikhamxay Province, Laos. The average activity concentrations of the natural radionuclides 226Ra, 232Th and 40K are 46.58  ±  7.36 , 71.19  ±  5.42 and 574.62  ±  25.02 Bq.kg-1, respectively. The average activity concentrations of 226Ra and 232Th in this work are higher than those of Bolikhamxay Province, Laos and the world average values. The estimated average outdoor annual effective dose (E) and radium equivalent actitvity (Raeq) are 0.10  ±  0.004 mSv.yr-1 and 192.64  ±  16.12 Bq.kg-1, respectively.

Keywords: Gamma-ray-spectroscopy, NaI(Tl) detector, ROI, student’s t distribution, Radiological Hazard Assessment

References

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