【摘要】 本文报道内蒙古自治区土壤中天然放射性核素含量的调查方法和结果。全区共采集668个土壤样品,其中25×25 km 网格点样品334个。测量采用γ能谱法。调查结果表明,内蒙古自治区土壤中天然放射性核素含量按面积和样品数加权的均值分别为:²³⁸U,29.76和28.60 Bq·kg^-1;²³²Th,33.42和34.89 Bq·kg^-1;²²⁶Ra,27.49和26.95Bq·kg^-1;⁴⁰K,655.56和624.63 Bq·kg^-1。更多还原

【Abstract】 This paper reports the methods and results of survey of natural radioniclides in soil in InnerMongolia.668 soil samples were collected and analysed by γ-spectrometry,of which 334 points were set in uniformly distributed networks of size 25×25 km.The results show that the area-weighted meanof ²³⁸U,²³²Th,²²⁶Ra and ⁴⁰K was 29.76,33.42,27.49 and 655.56 Bq·kg^-1,respectively.The point-weighted mean of ²³⁸U,²³²Th,²²⁶Ra and ⁴⁰K was 28.60,34.89,26.95 and 624.63 Bq·kg^-1,respec-tively.更多还原