挪威碳酸岩地区的室内伽马辐射与氡浓度
Indoor gamma radiation and radon concentrations in a Norwegian carbonatite area.
作者信息
Sundal A V, Strand T
机构信息
Department of Earth Science, University of Bergen, Allegata 41, N-5007 Bergen, Norway.
出版信息
J Environ Radioact. 2004;77(2):175-89. doi: 10.1016/j.jenvrad.2004.03.007.
Results of indoor gamma radiation and radon measurements in 95 wooden dwellings located in a Norwegian thorium-rich carbonatite area using thermoluminescent dosemeters and CR-39 alpha track detectors, respectively, are reported together with a thorough analysis of the indoor data with regard to geological factors. Slightly enhanced radium levels and thorium concentrations of several thousands Bq kg(-1) in the carbonatites were found to cause elevated indoor radon-222 levels and the highest indoor gamma dose rates ever reported from wooden houses in Norway. An arithmetic mean indoor gamma dose rate of 200 nGy h(-1) and a maximum of 620 nGy h(-1) were obtained for the group of dwellings located directly on the most thorium-rich bedrock.
报告了分别使用热释光剂量计和CR - 39α径迹探测器对位于挪威富含钍的碳酸岩地区的95座木屋进行室内伽马辐射和氡测量的结果，并对室内数据与地质因素进行了全面分析。发现碳酸岩中镭水平略有升高，钍浓度达数千Bq kg(-1)，这导致室内氡 - 222水平升高，以及挪威木屋有史以来报告的最高室内伽马剂量率。直接位于钍含量最高的基岩上的一组住宅，其室内伽马剂量率算术平均值为200 nGy h(-1)，最高为620 nGy h(-1)。
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