稀土材料中放射性分布研究  

Research on Radioactive Distribution in Rare-Earth Materials

作　　者：帅震清[1] 朱世富[1] 赵北君[1] 

机构地区：[1]四川大学材料科学与工程学院,成都610064

出　　处：《核动力工程》2004年第4期381-384,共4页Nuclear Power Engineering

基　　金：国家自然科学研究基金资助项目(10175047)

摘　　要：采用中子活化分析技术和γ能谱分析方法,分析了四川攀西地区各种类型的稀土产品的放射性含量研究了酸法处理工艺中的放射性分布及物理与化学特征.研究结果表明,四川攀西地区稀土矿中伴生的天然放射性物质主要是天然钍系,而铀系的含量是钍系含量的8.3%;稀土精矿(60%)的总α放射性水平为8.2×104～9.2×104Bq.kg-1,富镧氯化稀土的总α放射性水平为8.8×102～4.18×103Bq.kg-1;混合稀土化合物中的总α放射性水平均大于1×103Bq.kg-1;而稀土硅合金的放射性含量为5.1×102～2.6×104Bq.kg-1;单一稀土化合物的总α放射性水平均小于1×103 Bq.kg-1.The radioactive contents in some Rare earth materials which have been produced with RE ores in Sichuan Panxi area has been analyzed by the INAA technique and the Gamma-ray spectrum technique. The research on radioactive distribution and character of physics as well as chemistry in acid processing procedure has been completed. The results obtained show that the natural radioactive material in Rare- Earth ores in Sichuan Panxi area are mainly thorium series, meanwhile radioactive contents of uranium series are about 12 times lower than the contents of thorium series,totalαradioactive contents in RE ores (60%) are 8.2×104~9.2×104Bq.kg-1;total α radioactive contents in RECl3(abundant La) are 8.8?02 ~4.18?103Bq kg-1;totalαin the RE alloys are 5.1?02~2.6?04 Bq kg-1;and totalαin the pure RE compounds are lower than 1?02103Bq kg-1.

关 键 词：中子活化分析 能谱分析 稀土产品 放射性核素分布 

分 类 号：O615.2[理学—无机化学]