三维位置敏感CdZnTe伽马能谱仪中电荷共享效应的蒙特卡罗研究

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI:10.1109/NSSMIC.1998.775219

Y. F. Du, Z. He, W. Li, G. Knoll, D. Wehe

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引用次数: 20

摘要

通过蒙特卡罗模拟和实验测量研究了三维位置敏感CdZnTe探测器中的电荷共享效应。电荷共享主要是由电子的范围、光电相互作用后的x射线发射以及电荷载流子在向阳极漂移过程中的扩散引起的。在蒙特卡罗模拟中建立了一个包含扩散效应的简单模型。在不同的辐照和偏置条件下得到了很好的一致性。基于我们的模型模拟，建议为未来的662 keV伽马射线的1cm厚CZT探测器提供1mm的最佳像素尺寸。

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

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 our model simulations, a 1 mm optimal pixel size is recommended for future 1 cm thick CZT detectors for 662 keV gamma rays.

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来源期刊

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)

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