摘要
本文报道了北京地区56例居民骨灰样品中铷(Rb)浓度的热中子活化分析结果。结果表明,骨灰中Rb浓度呈对数正态分布,范围为1—15.4μg/g(骨灰),几何均值为5.0μg/g(骨灰),几何标准差为1.7;算术均值和标准差分别为5.5和3.3μg/g(骨灰)。在假定体内Rb浓度等于无机骨中Rb浓度条件下,估算出北京居民体内Rb平均浓度为3.0mg/kg(体内^(87)Rb平均比活度为2.8Bq/kg),体负荷量为0.21g,骨沉积量为15mg。并讨论了骨中Rb浓度与年龄和性别的关系。由体内^(87)Rb平均比活度,根据UNSCEAR1986年报告模式估算体内^(87)Rb所致居民年有效剂量当量约为1.9μSv。
The paper presents the measuring results of Rb concentrationin 56 bone ash samples from Beijing residents by neutron activationanalysis.The results show that the distribution of Rb concentration inbone is normal-exponential ranging from 1 to 15.4μg/g(ash), withgeometric mean 5.0μg/g(ash), a rithmetic mean 5.5±3.3μg/g(ash). Basedon the mean Rb concentration in the bone ash,the whole body burden ofRb was calculated as 0.21g,then it was estimated that the annual effectivedose equivalent from ^(87)Rb content in the adult body was 1.9μSv.The Rbconcentration in bone is dependent on age,while it is indepent of sex
出处
《辐射防护》
CAS
CSCD
北大核心
1990年第3期232-235,238,共5页
Radiation Protection
