Monte Carlo investigation of the charge sharing effects in 3-D position sensitive CdZnTe gamma ray spectrometers

Journal Article · Sun Aug 01 00:00:00 EDT 1999 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/23.790689· OSTI ID:684543

Du, Y F; He, Z; Li, W; Knoll, G F; Wehe, D K ^[1]

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1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Science

Charge sharing effects in a 3-D position sensitive CdZnTe detector have been investigated by Monte Carlo simulations and experimental measurements. The charge sharing is mainly caused by the range of electrons, x-ray emission following by photoelectric interactions, and the diffusion of charge carrier electrons during their drift towards the anodes. A simple model has been developed to include the diffusion effect in the Monte Carlo simulation. Good agreement has been achieved for various irradiation and bias conditions. Based on the model simulations, a 1 mm optimal pixel size is recommended for future 1 cm thick CZT detectors for 662 keV gamma rays.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG08-98NV13357
• OSTI ID: 684543
• Report Number(s): CONF-981110-; ISSN 0018-9499; TRN: 99:010070
• Journal Information: IEEE Transactions on Nuclear Science, Vol. 46, Issue 4Pt1; Conference: 1998 IEEE nuclear science symposium and medical imaging conference, Toronto (Canada), 10-12 Nov 1998; Other Information: PBD: Aug 1999
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
POSITION SENSITIVE DETECTORS
GAMMA SPECTROMETERS
SEMICONDUCTOR DETECTORS
CADMIUM TELLURIDES
ZINC TELLURIDES
MONTE CARLO METHOD
ENERGY RESOLUTION
CHARGE CARRIERS