Measurement of natural radioactivity in surface soils in a gold mining area and surrounding regions in Bolikhamxay province, Laos has been conducted using an HPGe detector. Soil samples were collected at 65 locations distributed widely in Bolikhamxay province, including 25 samples in the gold mining area in Khamkheut district. The average activity concentrations of 226\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{226}$$\end{document}Ra, 232\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{232}$$\end{document}Th and 40\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{40}$$\end{document}K are obtained as 44.4±3.2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$44.4\pm 3.2$$\end{document}, 63.3±5.2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$63.3\pm 5.2$$\end{document} and 523±18Bqkg-1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$523\pm 18\,\hbox {Bq\,kg}^{-1}$$\end{document}, respectively. The calculated average radium equivalent activity is 175±20Bqkg-1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$175 \pm 20\,\hbox{Bq\,kg}^{-1}$$\end{document}. Radiological hazard indices in the gold mining area are higher than the average values in the province by 15–20%.

中文翻译：

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老挝波利坎赛省某金矿区及周边地区表层土壤天然放射性测量及放射性危害评价

使用 HPGe 探测器对老挝 Bolikhamxay 省金矿区及周边地区表层土壤的天然放射性进行了测量。在博利坎赛省广泛分布的 65 个地点采集了土壤样品，其中 25 个样品在 Khamkheut 区的金矿区。平均活动浓度 226\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \ setlength{\oddsidemargin}{-69pt} \begin{document}$$^{226}$$\end{document}Ra, 计算出的平均镭当量活度为 175±20Bqkg-1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$175 \pm 20\,\hbox{Bq\,kg}^{-1}$$\end{document}。金矿区放射危害指数高于全省平均水平15%～20%。