内照射指数
- 网络internal exposure index
内照射指数-
通过对成都市土壤中天然放射性核素含量进行分析，得出放射性其外照射指数在0.35～0.7之间，内照射指数在0.17～0.31之间，二者都在国家建筑材料放射性核素限量标准控制式的范围内；
By analyzing the content of natural radioactive nuclides in soil , it could be conclude that the external exposure index in Chengdu is between 0.35 and 0.7 ; the internal radiation is between 0.17 and 0.31 ;
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结果广东省废渣建材（含渣水泥、渣砖）ECRa略高于传统建材（含水泥、红砖）。除少数建材外，其余建材的内、外照射指数基本相近，MRa和Mγ均小于10。
Results The EC Ra of waste residue building materials ( cement , brick ) of Guangdong was shown to be higher than that of traditional building materials ( M Ra < 1 0 , Mr < 1 0 ) .