摘要
本文报道四川省土壤中天然放射性核素含量调查的方法和结果。基本与环境陆地γ辐射剂量率调查同位布点,西部地区(甘孜、阿坝、凉山、渡口)按50 km×50 km 网格布点,东部地区按25km×25 km 网格布点,全省采集土壤样品370个,其中网格点样品352个,土壤类型加密点样品18个。测量采用γ能谱法。调查结果表明,四川省土壤中天然放射性核素含量按面积和按样品加权平均值分别为:^(238)U,34.8和34.7 Bq/kg;^(226)Ra,36.2和35.4 Bq/kg;^(232)Th,52.1和51.0 Bq/kg;^(40)K,578.2和571.2 Bq/kg。
This paper reports the methods and results of investigation of natural radionu-clides in soil in Sichuan Province.The collecting points of soil are same as the measuringpoints of γ radiation dose rate of environmental ground.370 soil samples were collected andanalysed by γ-spectrometry,of which 352 points were sited in uniformly distributed net-works.The results show that the area-weighted mean of ^(238)U,^(226)Ra,^(232)Th and ^(40)K was 34.8,36.2,52.1 and 578.2 Bq·kg^(-1),respectively.The sample-weighted mean of ^(238)U,^(226)Ra,^(232)Th and ^(40)K was 34.7,35.4,51.0and 571.2 Bq·kg^(-1),respectively.
出处
《辐射防护》
CAS
CSCD
北大核心
1993年第5期376-379,共4页
Radiation Protection
关键词
土壤
天然放射性
四川
环境调查
Soil
Natural Radionuclide
Content
Investigation
Sichuan Province
