Investigation of the Imaging Polarization Effect Based on a Pixellated CdZnTe Detector
作者： Li Miao , Xiao Sha-Li , Zhang Liu-Qiang , Cao Yu-Lin , Chen Yu-Xiao
DOI: 10.1088/0256-307X/27/7/070702
关键词:
摘要: A pixel array CdZnTe imaging system, employing a 40 × 5 mm3 pixellated detector, is established. The polarization effect in the detector for collimated Cs137 Gamma source investigated detail. experimental results different irradiated fluxes indicate that excessive flux indeed causes central pixels to be shut off completely. performance of polarized severely degraded. Polarized counts are simultaneously reduced one-third non-polarized counts. theoretical model potential distribution also proposed by solving Poisson equation and, turn, electric distortion high discussed comparison with results.
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