Clover型高纯锗探测器使用中的add-back性能

马鹏琮; 郑鹏松; 曾全波; 黄浩; 曾凡斐; 嘎达吉勒湖; 马鑫; 强赟华; 王建国; 李广顺

doi:10.11804/NuclPhysRev.40.2023023

Clover型高纯锗探测器使用中的add-back性能

Studies on the add-back Performance of a Clover Type HPGe Detector

摘要

摘要: 高纯锗探测器在γ谱学研究当中一直被广泛应用。本工作基于蒙特卡罗模拟的方法研究了Clover型高纯锗探测器的add-back性能。模拟了单晶体能谱和γ射线在不同晶体间发生康普顿散射的概率。与实验符合后，从γ射线多重性和γ源到探测器距离两个方面对add-back性能进行了研究。研究表明，在γ源距探测器25 cm的条件下，较高的多重性(M = 6 )对探测器的add-back因子影响不大，主要体现在低能区域。当γ源与探测器的距离减小时，add-back因子变化显著。特别是，在距离为5 cm和M = 6 的条件下，不推荐使用add-back分析。

Abstract: High Purity Germanium(HPGe) detectors have been widely used in γ spectroscopy. The add-back performance of Clover type HPGe detector is studied based on Monte Carlo simulation. We have simulated the energy spectrum from a single crystal and the Compton scattering probability of γ ray between different crystals. Good agreements have been achieved between the simulated results and experimental data. Afterwards the add-back performance is further studied in terms of γ ray multiplicity and the distance between γ source and the detector. The studies revealed that the higher multiplicity (M = 6 ) affects slightly on the add-back factor at 25 cm distance, mainly in the low energy region. With the distance decreases, the add-back factor changes dramatically. Typically, in the situation of 5 cm distance and M = 6 , the add-back analysis is not recommended.

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