收稿日期: 2016-01-16
网络出版日期: 2016-04-30
基金资助
国家自然科学基金资助项目(11375112, 11575108)
Influence of charge collection efficiency on energy spectrum for planar CdZnTe detector
Received date: 2016-01-16
Online published: 2016-04-30
李杨1, 罗文芸1, 贾晓斌1, 张家磊1, 王林军2 . 平面型CdZnTe探测器电荷收集效率对能谱测量的影响[J]. 上海大学学报(自然科学版), 2016 , 22(2) : 231 -237 . DOI: 10.3969/j.issn.1007-2861.2016.01.004
Using Monte-Carlo code Geant4 to model the planar CdZnTe detector, the incidences of two different energy ray 241Am (59.5 keV) and 137Cs (662 keV) to the planar CdZnTe detector from the cathode surface perpendicularly were simulated. The charge collection efficiency was calculated by adding the Hecht equation in Geant4. Combined with distributions of the deposited energy, electron-hole pairs and the interaction types, the influence of charge collection efficiency on the energy spectrum was discussed. The results showed that the energy spectrum shifted to the low energy side after considering the charge collection efficiency. The shift was closely connected to the maximum charge collection efficiency.
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