Spectroscopic Performance of Thick HgI2 Detectors.
Spectroscopic Performance of Thick HgI2 Detectors.
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厚 HgI2 探测器的光谱性能。
DOI：
10.1109/tns.2006.873714
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发表时间：
2006
影响因子：
1.8
通讯作者：
Sandoval,J
中科院分区：
文献类型：
--
作者：
Meng,LJ;He,Z;Alexander,B;Sandoval,J
本文介绍了两种新研制的像素化HgI/sub 2/探测器的光谱性能。这些检测器的尺寸为1/spl倍/1/spl倍/0.814 cm/sup 3/和1/spl倍/1/spl倍/1.016 cm/sup 3/。每个探测器在一个1/spl times/ 1cm /sup 2/表面的中心有四个紧密排列的1/spl times/ 1mm /sup 2/阳极像素。这些阳极像素被一个大阳极包围。这里给出的所有结果都是基于阳极像素下面的子卷的事件。在这些检测器中，信号由基于多个a -250前置放大器的离散电子器件和用于采样脉冲波形的数字示波器读出。利用深度传感技术对光峰值振幅随深度的变化进行校正。主要研究结果如下：(1)探测器的能量分辨率达到0.85 /spl sim/ 1.3%；(2)测得电子迁移寿命乘积为/spl sim/1/spl times/10/sup -2/ cm/sup 2/ V，测得电子迁移寿命为/spl sim/200 /spl mu/s；(3)观察到不同阳极像素下电子漂移特性的变化。实验还证明了内部电场强度的显著不均匀性。
This paper presents the spectroscopic performance of two newly developed pixelated HgI/sub 2/ detectors. These detectors are 1/spl times/1/spl times/0.814 cm/sup 3/ and 1/spl times/1/spl times/1.016 cm/sup 3/ in size. Each detector has four closely packed 1/spl times/1 mm/sup 2/ anode pixels at the center of one of the 1/spl times/1 cm/sup 2/ surfaces. These anode pixels are surrounded by a large anode. All results presented here are based on events from a sub-volume underneath the anode pixels. In these detectors, signals were read out by a discrete electronics based on multiple A-250 pre-amplifiers and a digital oscilloscope for sampling pulse waveforms. Depth sensing technique was used to correct the depth-dependent variation in photopeak amplitude. Main results presented are: (1)energy resolutions of 0.85 /spl sim/ 1.3% have been achieved on these detectors; (2) the electron mobility-lifetime product was measured to be /spl sim/1/spl times/10/sup -2/ cm/sup 2//V and the measured electron lifetime was /spl sim/200 /spl mu/s and (3) variation in electron drifting properties under different anode pixels were observed. Significant non-uniformity in internal electric field strength was also experimentally demonstrated.