摘要
本文报道了北京地区57例居民骨灰样品中^(232)Th 活度的中子活化分析结果。结果表明。人骨灰中^(232)Th 比活度的算术均值和中位数分别为7.6×10^(-4)和5.6×10^(-4)Bq/g,骨中^(232)Th 活度的算术均值和中位数分别为1.2和0.90Bq;所致骨表面细胞和红骨髓器官年吸收剂量分别为52μGy/a和4.0μGy/a;所致内照射的年有效剂量当量为41μSv/a,居民的膳食组成对这一结果可能有明显的影响。
The activities of ^(232)Th in 57 samples of human bone ashcollected from Beijing residents were determined through neutron activationtechnique.The results showed that the mean value of the specific activityof ^(232)Th in these bone ash samples was 7.6×10^(-4)Bq/g.The total activity inskeleton was 1.2 Bq.The corresponding annual absorbed doses wereestimated to be 52 μGy in bone linig cells and 4.0 μGy in red bonemarrow,respectively.The annual effective dose equivalent resulting fromthe bone content of ^(232)Th alone was 41 μSv,which was apparently higherthan that reported by western countries.The reason for this might be foundfrom the specific diet of Beijing residents.
出处
《辐射防护》
CAS
CSCD
北大核心
1989年第1期33-37,共5页
Radiation Protection
关键词
人骨
钍232
辐射剂量
北京
Human Bone
^(238)Th
Absorbed Doses
Annual Effective Dose Equivalent
