Open AccessAssessment of Natural Radioactivity and Associated Radiation Hazards in Soils samples from Khammuane Provine, Laos
Author(s) -
Somsavath Leuangtakoun,
Bùi Văn Loát,
Bui Thi Hong,
Duong Duc Thang,
Sounthone Singsoupho
Publication year - 2019
Publication title -
tạp chí khoa học đại học quốc gia hà nội: toán - lý (vnu journal of science: mathematics - physics)
Language(s) - English
Resource type - Journals
eISSN - 2615-9341
pISSN - 2588-1124
DOI - 10.25073/2588-1124/vnumap.4318
Subject(s) - radium , radionuclide , natural radioactivity , absorbed dose rate , soil water , effective dose (radiation) , environmental science , population , radiation exposure , soil test , environmental chemistry , radiochemistry , absorbed dose , nuclear medicine , chemistry , dosimetry , soil science , medicine , physics , nuclear physics , environmental health
The aims of this study are to determine the activity concentration of naturally occurring radionuclides in soils and the extent of their exposure to the population. The radioactivity concentrations of 226Ra, 232Th and 40K in the surface layers (5‑30 cm depth) collected from Khammoune province, Laos, were 32.57 ± 3.35 Bq.kg-1, 41.10 ± 3.04 Bq.kg-1 and 295.07 ± 17.36 Bq.kg-1respectively. From activity concentration of 226Ra, 232Th and 40K, we derived the parameters using the assessment of the radiological hazard from exposure to these soil samples. The average absorbed dose rate of all measured samples is 52.02 ± 4.09 nGy.h-1, while the average annual effective dose in the outdoor due to gamma radioactivity is found to be 0.06 ± 0.005 mSv.y-1.The average values for radium equivalent activity, external and internal hazard indices were found to be 114.07 ± 4.70 Bq.kg-1, 0.31 and 0.39, respectively.