两种稀土产品中放射性核素分析研究

ANALYSIS OF RADIONUCLIDES IN TWO RARE EARTH PRODUCTS

利用高纯锗γ谱仪对两个稀土产品氯化镧和氯化钇的样品进行能谱分析,研究经湿法冶炼工艺后的稀土产品中放射性核素的活度变化。结果表明,样品中存在天然放射性钍系和锕-铀系的核素,以及天然放射性核素138La和176Lu,但两个样品中所含的放射性核素不相同。氯化镧产品中锕-铀系和钍系核素放射性未达平衡,其主要子体224Ra和227Th的含量随时间发生明显变化,约60天达到平衡;而氯化钇产品没有这种现象。

This paper describes a study on raidoactivity change of rare-earth products after hydrometal- lurgy technology, using HPGe gamma spectrometer to analyze two rare earth products （ LaCl3 and YCl3 ）. The results show that in the two samples exist natural radionuelides of thorium series and actinium-uranium series as well as other natural radionuclides ^138La and ^176Lu. In the sample of lanthanum chloride the radioactivity of actinium-uranium series and thorium series has not reached balance, the contents of their main progenies ^226Ra and ^227Th obviously changes with the time, reaching balance 60 days later,while YCl3 keeps stability.