建筑材料中天然放射性的γ能谱分析  

The natural radioactivity measurement in building materials by γ ray spectrometry

作　　者：张小林[1] 张佳媚[1] 王世联[1] 

机构地区：[1]西北核技术研究所,陕西西安69信箱14分箱710024

出　　处：《核电子学与探测技术》2005年第3期330-333,282,共5页Nuclear Electronics & Detection Technology

摘　　要：应用HPGeγ谱仪对一批建筑材料中226Ra、232Th和40K的放射性比活度进行了测定。结果表明,根据GB6566-2001《建筑材料放射核素限量》,其内照射指数IRa和外照射指数Ir(除2#、3#样品外)均达国家标准限制要求,可作为建筑主体材料使用。根据放射性水平指数,皆属于A类装修材料。并计算了相关的年有效剂量当量。The specific activities of some natural nuclides (()^(232)Th,()^(226)Ra and ()^(40)K) in 7 samples of building materials were measured using a HPGe γ spectrometer. Except samples No 2 and No 3, the internal and the external exposure index of other samples are within the required values as main materials for building according to the national standard GB 6566-2001. According to their radioactive levels, all samples belong to class A decorative materials. Besides, relative annual effective dose equivalents were also computerized.

关 键 词：建筑材料 γ能谱分析 天然放射性 GB6566-2001 HPGEΓ谱仪 年有效剂量当量 放射性比活度 外照射指数 放射性水平 ^40K 国家标准 材料使用 建筑主体 装修材料 内照射 

分 类 号：TL817.2[核科学技术—核技术及应用] TU5[建筑科学—建筑技术科学]