深度传感共面栅格CdZnTe探测器的特性

2003 IEEE Nuclear Science Symposium. Conference Record (IEEE Cat. No.03CH37515) Pub Date : 2003-10-19 DOI:10.1109/NSSMIC.2003.1352687

Zhong He, B. Sturm

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引用次数: 7

摘要

最新的深度传感共面网格CdZnTe探测器，每个探测器的尺寸为1.5/spl倍/1.5/spl倍/1厘米/sup /，采用第三代共面阳极设计，已经过测试。在662 keV伽马射线能量下，能量分辨率为2.0% FWHM。探测器的性能在实验中被观察到是伽马射线相互作用深度的函数，也是阳极表面附近径向位置的函数。讨论了深度传感技术与相对增益补偿法的区别。测量结果表明了第三代阳极设计的改进，以及利用深度传感技术校正电子俘获的优势。在两个1.5/spl次/1.5/spl次/1 cm/sup 3/探测器上直接观察和比较了eV产物制备的CdZnTe晶体的材料均匀性。

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Characteristics of depth sensing coplanar-grid CdZnTe detectors

The latest depth-sensing coplanar-grid CdZnTe detectors, each has dimensions of 1.5/spl times/1.5/spl times/1 cm/sup 3/ and uses third-generation coplanar-anode design, have been tested. An energy resolution of 2.0% FWHM at 662 keV gamma-ray energy was obtained. Detector performance has been observed experimentally as a function of depth of gamma-ray interaction, and as a function of radial position near the anode surface. The difference between the depth-sensing technique and the relative gain compensation method is discussed. The measured results show the improvement of third-generation anode design, and the advantage of using depth sensing technique for the correction of electron trapping. Material uniformity of CdZnTe crystals manufactured by eV products have been directly observed and compared on two 1.5/spl times/1.5/spl times/1 cm/sup 3/ detectors.

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来源期刊

2003 IEEE Nuclear Science Symposium. Conference Record (IEEE Cat. No.03CH37515)

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