Analysis of detector response using 3-D position sensitive CZT gamma-ray spectrometers

被引：2
|
作者：
Zhang, F [1 ]
He, Z [1 ]
Xu, D [1 ]
机构：
[1] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA
来源：
2003 IEEE NUCLEAR SCIENCE SYMPOSIUM, CONFERENCE RECORD, VOLS 1-5 | 2004年
关键词：
D O I：
10.1109/NSSMIC.2003.1352664
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Two 2.25 cm(3) CdZnTe gamma-ray spectrometers with 3-D position sensitivity were constructed and tested. By using 11 by 11 pixellated anodes and depth sensing technique, individual spectral data for each of over 2000 voxels were collected throughout the detector volume. Energy resolution of 1.11% FWHM, 1.57% FWHM and 2.13% FWHM at 662 keV were obtained for one, two and three-pixel events respectively from the 120 working pixels of one detector. Spatial variation of electron mobility and lift time product, energy resolution, photo-peak efficiency and total efficiency have been observed and analyzed. This analysis provides a direct observation on the uniformity of detector response (due to material and electric field distribution) in 3-dimension. The impact of the spatial variation of detector response on a CZT gamma-ray spectrometer will be discussed.
引用
收藏
页码：3493 / 3497
页数：5
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