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本文初步研究了四川盆地产出水稻及相应土壤的天然辐射环境水平。用HPGeγ谱仪测定水稻及相应土壤中的4种天然放射性核素238U、232Th、226Ra和40K的活度浓度,计算了四种核素从土壤迁移转化至水稻的转移系数,对居民食入水稻造成的剂量进行了估算。研究表明四川盆地产出水稻的天然辐射环境质量状况良好,暂不存在高放射性水平的风险。
The paper initially studied the natural radiation environment of paddy rice and corresponding soil in Sichuan Basin. The activities of four radionuclides 238U, 232Th, 226Ra and 40K in rice and corresponding soils were measured by HPGe gamma spectrometer. The transfer coefficients of four radionuclides from soil to rice were calculated, The resulting dose was estimated. The research shows that the natural radiation environment quality of output rice in Sichuan Basin is in good condition, and there is no risk of high radioactivity level.