X-Ray Beam Studies of Charge Sharing in Small Pixel, Spectroscopic, CdZnTe Detectors

X-Ray Beam Studies of Charge Sharing in Small Pixel, Spectroscopic, CdZnTe Detectors
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小像素光谱 CdZnTe 探测器中电荷共享的 X 射线束研究

DOI:
10.1109/tns.2012.2195678
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发表时间:
2012
影响因子:
1.8
通讯作者:
Allwork C
Allwork C
中科院分区:
工程技术3区
文献类型:
--
作者:
Allwork C

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CdZnTe材料生长的最新进展已经允许开发小像素、光谱、X射线成像探测器。这些探测器在医疗、安全和工业部门等各种领域都有应用。随着像素的尺寸相对于检测器厚度减小,由于漂移通过检测器的电荷云的非零宽度,电荷在多个像素之间共享的概率增加。这些电荷共享事件将导致检测器的光谱性能的退化,并且在分析检测器响应时必须考虑。本文用单色X射线束在英国金刚石光源上研究了250米间距CdZnTe像素探测器中的电荷共享和电荷损失。使用一个20米的光束直径的探测器响应已被映射为X射线能量以上(40千电子伏)和以下(26千电子伏)的材料壳吸收能量,研究电荷共享和荧光X射线在这些事件中的作用。
Recent advances in the growth of CdZnTe material have allowed the development of small pixel, spectroscopic, X-ray imaging detectors. These detectors have applications in a diverse range of fields such as medical, security and industrial sectors. As the size of the pixels decreases relative to the detector thickness, the probability that charge is shared between multiple pixels increases due to the non zero width of the charge clouds drifting through the detector. These charge sharing events will result in a degradation of the spectroscopic performance of detectors and must be considered when analyzing the detector response. In this paper charge sharing and charge loss in a 250m pitch CdZnTe pixel detector has been investigated using a mono-chromatic X-ray beam at the Diamond Light Source, U.K. Using a 20m beam diameter the detector response has been mapped for X-ray energies both above (40 keV) and below (26 keV) the material-shell absorption energies to study charge sharing and the role of fluorescence X-rays in these events.
DOI: 10.1109/tns.2011.2162746
发表时间: 2011-08
影响因子: 1.8
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DOI: --
发表时间: 2007
期刊: IEEE Nuclear Science Symposium Conference Record
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DOI: --
发表时间: 2009
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DOI: 10.1088/1748-0221/6/12/c12009
发表时间: 2011-12-01
影响因子: 1.3
作者:
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