Charge sharing in common-grid pixelated CdZnTe detectors |
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| Authors: | Jae Cheon Kim Stephen E. AndersonWilly Kaye Feng ZhangYuefeng Zhu Sonal Joshi KayeZhong He |
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| Affiliation: | Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, USA |
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| Abstract: | The charge sharing effect in pixelated CdZnTe (CZT) detectors with a common anode steering grid has been studied. The impact on energy resolution of weighting potential cross-talk and ballistic deficit due to cathode signal shaping has been investigated. A detailed system modeling package considering charge induction, electronic noise, pulse shaping, and ASIC triggering procedures has been developed to study the characteristics of common-grid CZT detectors coupled to the VAS_UM/TAT4 ASIC. Besides an actual common-grid CZT detector coupled to VAS_UM/TAT4 ASIC, a prototype digital read-out system has been developed to better understand the nature of the charge sharing effect. |
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| Keywords: | Charge sharing Semiconductor detector CdZnTe Signal modeling Position-sensitive Steering grid Weighting potential cross-talk |
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