[1]张育潜,傅 莉.准半球型CdZnTe探测器能谱特性的影响因素[J].南京理工大学学报(自然科学版),2017,41(06):769.[doi:10.14177/j.cnki.32-1397n.2017.41.06.017]
 Zhang Yuqian,Fu Li.Influential factors of spectral characteristics of quasihemispherical CdZnTe detectors[J].Journal of Nanjing University of Science and Technology,2017,41(06):769.[doi:10.14177/j.cnki.32-1397n.2017.41.06.017]
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准半球型CdZnTe探测器能谱特性的影响因素()
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
41卷
期数:
2017年06期
页码:
769
栏目:
出版日期:
2017-12-31

文章信息/Info

Title:
Influential factors of spectral characteristics of quasihemispherical CdZnTe detectors
文章编号:
1005-9830(2017)06-0769-04
作者:
张育潜傅 莉
西北工业大学 辐射探测材料与器件工业和信息化部重点实验室,陕西 西安 710072
Author(s):
Zhang YuqianFu Li
Key Laboratory of Radiation Detection Materials and Devices of Ministry of Industry andInformation Technology,Northwestern Polytechnical University,Xi’an 710072,China
关键词:
CdZnTe 准半球型探测器 能谱特性 有限元软件 能量分辨率 峰康比
Keywords:
CdZnTe quasi hemispheric detectors spectral characteristics finite element software energy resolution peak to Compton ratio
分类号:
TN304.2
DOI:
10.14177/j.cnki.32-1397n.2017.41.06.017
摘要:
为解决CdZnTe(CZT)探测器空穴拖尾的问题,基于Shockley-Ramo原理,采用GEANT4和COMSOL有限元软件,模拟计算了准半球型CZT探测器对137Cs@662 keV的能谱响应。模拟结果表明:(μτ)e范围为(1~10)×10-3 cm2/V时适合采用准半球型探测器的结构设计;(μτ)h对能谱的影响较小;(μτ)e和(μτ)h相差较大时,能量分辨率较好,但是当(μτ)h增大时,拖尾现象开始逐渐显现; 提高(μτ)e和探测器偏压均可改善能谱特性。根据模拟计算出的最优探测器参数制备了尺寸为10 mm×10 mm×5mm的准半球型CZT探测器,其对137Cs@662 keV的能量分辨率为1.17%,峰康比为6.86。
Abstract:
The spectral responses of quasi hemispherical CdZnTe(CZT)detectors to 137Cs@662 keV are simulated using finite element software GEANT4 and COMSOL and the Shockley-Ramo principle to solve the hole tailing problem.The simulation results show that,quasi hemispherical CZT detectors are fit for the(μτ)e of(1~10)×10-3 cm2/V; the value of(μτ)h has less effect on the energy spectrum; when the difference between(μτ)h and(μτ)e is larger,the energy resolution is better,but the hole tailing problem appears gradually with(μτ)h increasing; spectrum characteristics improve with the(μτ)e of CdZnTe and the bias increasing.A quasi hemispherical CdZnTe detector with the size of 10 mm×10 mm×5mm is fabricated based on the theoretical calculation.Its energy resolution for 137Cs@662 keV detector is 1.17%,and the peak to Compton ratio is 6.86.

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备注/Memo

备注/Memo:
收稿日期:2017-09-25 修回日期:2017-11-08
作者简介:张育潜(1981-),男,博士生,主要研究方向:功能材料与器件,E-mail:20742232@qq.com。
引文格式:张育潜,傅莉.准半球型CdZnTe探测器能谱特性的影响因素[J].南京理工大学学报,2017,41(6):769-772.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2017-12-31