摘要
本文报道湖南省土壤中天然放射性核素含量的调查结果。布点方法与环境陆地γ辐射剂量率调查相同,全省共布25×25km 网格点309个,土类加密点5个,特殊加密点7个,共采集土壤样品321个。土壤样品中天然放射性核素含量的测定采用放化分析方法。调查结果表明,湖南省土壤中^(23(?))U、^(232)Th、^(226)Ra 和^(40)K 含量按样品数的加权均值分别为48.05、54.82、59.36和447.75Bq/kg。零陵地区土壤中^(238)U、^(232)Th 和^(226)Ra 含量最高,郴州地区次之,湘西自治州地区居三。湖南省6类主要土壤中^(40)含量较为接近,而红壤中^(238)U、^(232)Th 和^(226)Ra 含量较高。
This paper presents the results of natural radionuclides content in soil in Hunan Province.There were totally 321 samples collected from 321 measuring points,among which 309 points were sit-ed in uniformly distributed networks of size 25×25km,and other 12 points were more densely dis-trihuted.The samples were analysed by radiochemical method.The results showed that the sample-weighted average concentration of ^(238)U,^(232)Th,^(226)Ra and ^(40)K was 48.05,54.82,59.36 and 447.75 Bq·kg^(-1) respoctively.
出处
《辐射防护》
CAS
CSCD
北大核心
1991年第2期145-151,共7页
Radiation Protection
关键词
土壤
放射性核素
含量
调查
Soil
Naturat Radionuclide
Concentration
Investigation
Hunan
