摘要
本文报道了用国产 FD—71型闪烁辐射仪测定城市天然γ照射量率的一般方法,给出了测量结果,并对有关问题进行了分析和讨论。佳木斯天然γ辐射场是均匀的室内外比值为1.48。按人口加数室内外均匀值为13.3±0.71μR/h,8.99±0.72μR/h.水面均值为0.2mk/n。佳木斯居民所受天然γ外照射剂量当量为96.05m/y,年有效剂量当量为0.97msv。属于天然γ辐射低本底地区。
This aeticle rsports a general method of measuing the natriuralr exposure rate with the home -made FD-71 Flash Actinograph.The naturalr radiation field of Jiamusi city is even,and its ra- tio between from population,the average indoor and outdoor values are 31.3±0.71uR/h,and 8. 99±0.72μR/h.The average value on the water surface is 0.2uR/h(without correction).The nat- ural outdoor γ exposure equivalent amount upon the civilians of Jiamusi is 96.05 rare m/y,the yearly effective equivalent is 0.97mSV.Therefore,the city is one with low natural γ radiation.
关键词
剂量当量
吸收剂量
照射量率
放射性核素
exposure rate
radiation degree equivalent
absorption amount
radiovative nulide
