一种钚同位素分析方法及实现

A New Method of Plutonium isotopes analysis and Its Software Realization

同位素丰度及其分离时间是钚材料的两个重要属性,目前常用的分析软件是由美国采用固定能量法开发的PC/Fram和MGA。本文提出一种基于非固定能量法测量分析钚材料同位素丰度及其分离时间的新方法,并据此自主开发了γ谱分析软件,其原理是通过分析钚材料γ能谱中钚同位素及镅-241的特征γ射线,利用相对效率和加权平均的处理方法,得到钚材料中放射性核素的相对活度,在此基础上计算出钚材料的同位素丰度及其分离时间,并对该方法进行验证。

The concentration of isotopes and the last separation time from Americium-241 are two important attributes of Plutonium materials , and MGA and PC/Frarn. are the two commonly used commercial softwares in Plutonium isotopes analysis. In the present paper, a new method based on non-fixed enengy calibration and relative efficiency and weighted averaged method is put forward and the corresponding software is developed. The principle of which is that based on the characteristic γ enengy spectrum analysis for Plutonium isotopes and Americium-241, the relative radiation intensities of the isotopes in Plutonium materials are derived. The concentration of isotopes and the last separation time from Americium-241 could be calculated.