Sanusi M S M, Ramli A T, Gabdo H T, Garba N N, Heryanshah A, Wagiran H, Said M N
Department of Physics, Faculty of Science, University Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia.
Department of Physics, Faculty of Science, University Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia.
J Environ Radioact. 2014 Sep;135:67-74. doi: 10.1016/j.jenvrad.2014.04.004. Epub 2014 May 4.
A terrestrial gamma radiation survey for the state of Selangor, Kuala Lumpur and Putrajaya was conducted to obtain baseline data for environmental radiological health practices. Based on soil type, geological background and information from airborne survey maps, 95 survey points statistically representing the study area were determined. The measured doses varied according to geological background and soil types. They ranged from 17 nGy h(-1) to 500 nGy h(-1). The mean terrestrial gamma dose rate in air above the ground was 182 ± 81 nGy h(-1). This is two times higher than the average dose rate of terrestrial gamma radiation in Malaysia which is 92 nGy h(-1) (UNSCEAR 2000). An isodose map was produced to represent exposure rate from natural sources of terrestrial gamma radiation.
为获取环境放射卫生实践的基线数据，对雪兰莪州、吉隆坡和布城进行了一次陆地伽马辐射调查。根据土壤类型、地质背景以及航空测量图信息，确定了95个能在统计学上代表研究区域的调查点。测量剂量因地质背景和土壤类型而异，范围为17纳戈瑞每小时至500纳戈瑞每小时。地面上方空气中的陆地伽马平均剂量率为182±81纳戈瑞每小时。这比马来西亚陆地伽马辐射的平均剂量率92纳戈瑞每小时（联合国原子辐射效应科学委员会，2000年）高出两倍。绘制了一张等剂量率图，以表示陆地伽马辐射天然源的照射率。
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