Characteristics of natural radionuclides and 137Cs in surface soil in Phonsavan, Xiengkhouang, Laos
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Published:2023
Issue:4
Volume:38
Page:289-300
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ISSN:1451-3994
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Container-title:Nuclear Technology and Radiation Protection
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language:en
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Short-container-title:Nucl Technol Radiat Prot
Author:
Bui Thi-Hong1, Bui Van-Loat1, Leuangtakoun Somsavath2, Lathdavong Lemthong2, Xayhuangsy Sonexay2, Duong Duc-Thang3, Tran Dinh-Khoa4, Tran Van-Khanh1, Le Ngoc-Thiem3, Phan Giang5, Hoang Van-Khanh6, Tran Hoai-Nam6
Affiliation:
1. Faculty of Physics, VNU University of Science, Hanoi, Vietnam 2. Department of Physics, Faculty of Natural Science, National University of Laos, Dongdok Vientiane, Laos 3. Institute for Nuclear Science and Technology, Vietnam Atomic Energy Institute, Hanoi, Vietnam 4. Dalat Nuclear Research Institute, Vietnam Atomic Energy Institute, Lamdong, Vietnam 5. Institute of Fundamental and Applied Sciences, Duy Tan University, Da Nang, Vietnam + Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam 6. Phenikaa Institute for Advanced Study, Phenikaa University, Hanoi, Vietnam
Abstract
Assessment of the characteristics of natural radionuclides and 137Cs in soil
in Phonsavan district, Xiengkhouang province, Laos has been conducted
using a standard electrode coaxial Ge (SEGe) detector. Soil samples were
collected at 20 locations close to the populated and agricultural area in
Phonsavan district. The average activity concentrations of 226Ra, 238U,
232Th, 40K and 137Cs are 54.0 ? 2.5, 65.1 ? 4.4, 96.9 ? 3.7, 433.2 ? 20.7,
and 1.54 ? 0.13 Bqkg-1, respectively. The average radium equivalent
activity Raeq is 225.9 ? 7.8 Bqkg-1. The highest Raeq of 269.9 Bqkg-1 is
still lower than the safety limit of 370 Bqkg-1. Associated radiological
hazard indices, such as absorbed gamma dose rate, outdoor annual effective
dose equivalent, excess lifetime cancer risk, external and internal hazard
indices, and gamma index, were also calculated and presented.
Publisher
National Library of Serbia
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