稀土产品中^(227)Ac的放射性增长研究

Study of the radioactivity growth of ^(227)Ac in rare earth products

本研究推算并验证了稀土产品中227Ac的放射性增长理论曲线。采用HPGe-γ谱仪,通过无源效率刻度方法及适当的解谱方法,测定了高纯镧产品中227Ac放射性比活度的增长。结果表明,第一:测得的227Ac的放射性增长曲线与理论推算结果一致;第二:采用理论推算曲线可以准确计算出稀土产品中227Ac的平衡比活度,达到快速检测的目的。

The paper calculates and verifies the theoretical curve of the radioactivity growth of ^227 Ac in rare earth products. By the application of sourceless efficiency method on HPGe-γ ray spectrometer,we have measured the radioactivity growth of ^227 Ac in high purity lanthanum products through appropriate analysis of the spectrum.The results show that,utilizing sourceless efficiency method on HPGe-γ ray spectrometer,firstly,the specific radioactivity growth of ^227 Ac measured is in accord with the theoretical curve calculated; secondly,it is accurate to calculate the balance specific activity of ^227 Ac in rare earth products by the employ of the calculated theoretical curve,and makes the rapid determination possible.