哈密地区环境中^（220）Rn子体α潜能浓度所致居民剂量估算

ESTIMATE OF SENDOUT OF ￣220 Rn's DECAY PRODUCT a LATENT ENERGY CONCENTRATION TOLOCAL RESIDENT IN ENVIRONMENT OF HAMIPREFECTLTRE

用ＳｔｒａｎｄｅｎＥ．推荐的测量方法对哈密地区环境空气中２２０Ｒｎ子体α潜能浓度测量结果表明，室内、外平均值分别为５６．１和１０．２（×１０－７Ｊ·ｍ－３）。室内外２２０Ｒｎ／２２２Ｒｎ子体α潜能浓度比值分别为０．８４和０３２。２２０Ｒｎ子体所致居民有效剂量当量为２２８μＳｖ·ａ－１（集体有效剂量当量为０．９×０２ｍａｎ·Ｓｖ）。

The latent energy conceotraiton of 220 Rn's decayproduct a was measured by the method recommended bystranden E. The results show that in and out building average value are 56. 1 and 10. 2(×10-7J·m-3),respectively. It ratio (220Rn/222Rn) are 0. 84and 0. 32,respectively. The effective dose equivalent of the decay productof -220Rn to the local residents is 228 μ Sr·a-1(The collective effective dose equivalent is 0. 9×102 man·Sr).