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Journal of Shanghai University >

2016 , Vol. 22 >Issue 2: 231 - 237

DOI: https://doi.org/10.3969/j.issn.1007-2861.2016.01.004

Influence of charge collection efficiency on energy spectrum for planar CdZnTe detector

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  • 1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;
    2. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

Received date: 2016-01-16

  Online published: 2016-04-30

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Abstract

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.

Key words： energy spectrum;  CdZnTe detector;  charge collection efficiency;  electron-hole pairs; Geant4

Cite this article

LI Yang1, LUO Wenyun1, JIA Xiaobin1, ZHANG Jialei1, WANG Linjun2 . Influence of charge collection efficiency on energy spectrum for planar CdZnTe detector[J]. Journal of Shanghai University, 2016 , 22(2) : 231 -237 . DOI: 10.3969/j.issn.1007-2861.2016.01.004

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