<sup>240</sup>Pu丰度计算的γ能谱分析方法

²⁴⁰Pu丰度计算的γ能谱分析方法

摘要: 构建了多重峰模型，在算法上采用改进非线性最小二乘拟合法，对多重峰峰面积进行拟合计算，回避了关联扣除带来的风险。实验表明：使用开发的γ属性分析例程分析的²⁴⁰Pu丰度不确定度较原来的分析算法降低1倍，在95%的置信概率下测量不确定度小于10%。

Abstract: A γ-ray spectrum analysis algorithms of multi-overlap-peak model and Levenberg-Marquardt (an improved nonlinear least squares fitting) for ²⁴⁰Pu abundance were developed to achieve accurate results. The peak area calculation can avoid the risks of associated subtraction by multi-peak fitting directly. The experiment results show that the improved method can give better results of ²⁴⁰Pu abundance, compared with the previous algorithm. The uncertainty of ²⁴⁰Pu abundance is less than 10% at 95% confidence level.