The use of pulse processing techniques to improve the performance of Cd/sub 1-x/Zn/sub x/Te gamma-ray spectrometers
The use of pulse processing techniques to improve the performance of Cd/sub 1-x/Zn/sub x/Te gamma-ray spectrometers
复制标题
使用脉冲处理技术提高 Cd/sub 1-x/Zn/sub x/Te 伽马射线能谱仪的性能
DOI：
10.1109/nssmic.1995.504192
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
R. James
中科院分区：
文献类型：
--
作者：
J. Lund;R. Olsen;J. van Scyoc;R. James
Cd/sub - 1-x/Zn/sub -x/ Te （CZT）最近显示出作为室温伽马射线探测器材料的巨大前景。大体积（bbb10 1cm/sup 3/）高电阻率CZT晶体的可用性使得探测器的演示比用类似材料CdTe建造的探测器大得多。然而，像许多其他室温材料一样，czt也受到空穴传输性能差的困扰。由于CZT的空穴漂移特性差，导致其在伽马射线脉冲高度谱中出现“空穴尾”现象。我们采用脉冲处理方法来降低空穴尾效应，提高CZT探测器的能量分辨率。本文采用数字上升时间补偿和双时间常数采样两种信号处理方法来减少CZT探测器的空穴尾迹。我们讨论了这些技术的实现，演示了在实验室中获得的结果，并与其他探测器系统的性能进行了比较。
Cd/sub 1-x/Zn/sub x/Te (CZT) has recently shown great promise for use as a room temperature gamma-ray detector material. The availability of large volume (>1cm/sup 3/) high resistivity CZT crystals has allowed the demonstration of detectors much larger than can be built with the similar material CdTe. However, CZT-like many other room-temperature materials-suffers from the poor transport properties of holes. The poor hole drift properties of CZT cause the characteristic "hole tailing" in gamma-ray pulse height spectra. We have applied pulse processing methods to reduce the hole tailing effects and improve the energy resolution of CZT detectors. We have used two signal processing methods to reduce hole tailing in CZT detectors: digital rise-time compensation and dual time-constant sampling. We discuss the implementation of these techniques, demonstrate results obtained in the laboratory, and compare the performance obtained with other detector systems.