摘要
HPGeγ能谱无源效率刻度方法具有无需标准物质、便于就地测量和高效准确测量等特点,是γ能谱放射性分析的重要手段。使用IAEA参考物质验证了实验室无源效率刻度方法的可靠性,利用此方法对江苏省稀土废渣中放射性核素进行分析。结果表明,稀土废渣中铀(钍)系母子体间放射性平衡被破坏,放射性水平具有明显差异。针对此现象,对江苏省稀土冶炼分离企业的放射性废渣进行了调查分析,并对其减容化提出建议。
Background： The radioactivity levels of rare earth residues in Jiangsu province are not well known, and there are no explicit laws on their regulation. Purpose： By analyzing the radioactive nuclides in rare earth residues of Jiangsu province, we plan to propose some suggestions on volume reduction. Methods： HPGe y spectrometry sourceless efficiency calibration method is playing an important role in the radioactive analysis because of its high accuracy and efficiency. It can be used without standard radioactive source and is easy to be measured on the spot. The reliability of method was verified by using IAEA reference materials. Results： The results show that in the rare earth residues the radioactive equilibrium of uranium and thorium decay series has been broken, and the radioactive levels in different samples have obvious difference. Conclusions： Based on the results, this paper investigates and analyses the radioactive residues of rare earth smelting and separation plants in Jiangsu Province, and puts forward some suggestions on volume reduction.
出处
《核技术》
CAS
CSCD
北大核心
2013年第8期25-30,共6页
Nuclear Techniques
基金
江苏省环保科研基金资助项目(201150)资助
关键词
稀土
废渣
放射性平衡
伽玛能谱
无源效率刻度
Rare earth, Residue, Radioactive equilibrium, Gamma spectrometry, Sourceless efficiency calibration
