【摘要】 本文报道陕西省土壤中天然放射性核素含量的调查研究结果。基本与环境陆地γ辐射剂量率调查同位布点，全省共采集土壤样品６８７个，其中２５ｋｍ×２５ｋｍ网格点土样３５９个。测量采用放化分析法。调查结果表明，陕西省土壤中天然放射性核素含量按面积和按网格点加权均值分别为：￣（２３８）Ｕ，３４．８和３４．３Ｂｑ·ｋｇ￣（－１）；￣（２２６）Ｒａ，３５．４和３４．８Ｂｑ·ｋｇ￣（－１）；￣（２３２）Ｔｈ，４７．３和４６．７Ｂｑ·ｋｇ￣（－１）；￣（４０）Ｋ，６０６．１和６０４．２Ｂｑ·ｋｇ￣（－１）。更多还原

【Abstract】 This paper reports the methods and results of investigation of natural radionu-clides in soil in Shanxi Province. The collecting Points of soil a re same as the measuringPoints of γ radiation dose rate of environmental ground 687 soil samples were collected andanalysed by radiochemical method, of which 359 points were sited in uniformly distributednetworks of size 25 km×25 km. The results show that the area-weighted mean of ￣(238)U,￣(226)Ka,￣(232)Th and￣(40)K was 34. 3,34. 8,46. 7 and 604.2Bq·kg￣(-1) ,respectively.更多还原