HPGe γ 谱仪点源到体源效率的相对比较传递方法

Relative Comparison Transfering Method of the Ge Spectrometer Efficiency of Volume Source from Point Source

本文介绍了一种ＨＰＧｅγ谱仪点源到体源效率的相对比较传递方法。采用一种简单参数的蒙特卡罗方法计算峰效率，实验测量点源的效率曲线，并与一个“标准”测量系统或一系列测量系统的计算和实验结果相对比较，可以获得体源的效率刻度。在探测效率分别为２０％、３０％、５０％的ＨＰＧｅ谱仪系统上，用这种方法获得的体源效率与实验测量结果的偏差在±４％以内。

The paper discribes a relative comparison method to derive efficiency of volume source from point source Calculating the full energy peak efficiency of volume and point source with a simplified parameters Monte Carlo method, measuring the full energy peak efficiency of the point source, and than comparing the caculated and measured results for a standard or a series of Ge spectrometer respectively, the efficiency of volume source can be determined For three Ge spectrometers of relative efficiency 20%,30%and50%, the relative fluctuation of peak efficiency between the measurements and results derived with this method is less than ±4% (