Intensifying process of polarization ef fect within pixellated CdZnTe detectors for X-ray imaging

王玺 Xi Wang, 肖沙里 Shali Xiao, 黎淼 Miao Li, 张流强 Liuqiang Zhang, 曹玉琳 Yulin Cao, 陈宇晓 Yuxiao Chen
2011 Chinese Optics Letters (COL)  
The intensifying process of polarization effect at room temperature in a pixellated Cadmium zinc telluride (CdZnTe) monolithic detector is studied. The process is attributed to the increase in build up space charges in the CdZnTe crystal, which causes an expansion of the space charge region under the irradiated area. The simulations of electric potential distributions indicate that the distorted electric potential due to the high X-ray flux is significantly changed and even deteriorated due to
more » ... ncreasing space charges within the irradiated volume. An agreement between the space charge distribution and electric potential is discussed.
doi:10.3788/col201109.070401 fatcat:nhtdkcsl3fh7rd5ktl5fw5thqe