|本期目录/Table of Contents|

基于Geant4仿真的CsI(Tl)闪烁体厚度优化(PDF)

《纳米技术与精密工程》[ISSN:1672-6030/CN:12-1351/O3]

期数:
2017年6期
页码:
444-448
栏目:
出版日期:
2017-11-15

文章信息/Info

Title:
Optimization of CsI(Tl)Scintillator Thickness Based on Geant4 Simulation
文章编号:
1672-6030(2017)06-0444-05
作者:
陈津平1 杨峻雄2 邹晶123 胡晓东123 吕寒玉2
1.精密测试技术及仪器国家重点实验室(天津大学), 天津 300072; 2. 天津大学精密仪器与光电子工程学院, 天津 300072; 3. 北京数学与信息交叉科学协同创新中心, 北京 100048
Author(s):
Chen Jinping1 Yang Junxiong2 Zou Jing123 Hu Xiaodong123 Lü Hanyu2
1. State Key Laboratory of Precision Measuring Technology and Instruments(Tianjin University), Tianjin 300072, China; 2. School of Precision Instrument and OptoElectronics Engineering, Tianjin University, Tianjin 300072, China; 3. Beijing Center for Mathematics and Information Interdisciplinary Sciences, Beijing 100048, China
关键词:
碘化铯 Geant4 闪烁体厚度 蒙特卡罗 发光效率
Keywords:
CsI(Tl) Geant4 scintillator thickness Monte Carlo luminous efficiency
分类号:
TL812文
DOI:
10.13494/j.npe.20150132
文献标识码:
A
摘要:
由闪烁体和光电转换器件构成的闪烁体探测器是工业CT系统中最常用的探测器,其中闪烁体负责将X射线转换为可见光信号,再经过光电转换器件转换为电信号进行探测.闪烁体作为探测器的一部分,其厚度直接影响发光效率和探测分辨性能.本文基于蒙特卡罗仿真平台Geant4建立仿真模型,对碘化铯CsI(Tl)闪烁体在不同厚度、不同X射线能量(20~80 keV)下的特性进行模拟,分析闪烁体厚度对闪烁体转换效率以及分辨力的影响.通过仿真获了特定输入能量下对应的闪烁体的理想厚度值.仿真结果可以为闪烁体参数设计和优化提供参考.
Abstract:
Scintillator and optoelectronic conversion device coupled X-ray detector is widely used in industry CT system. The scintillator of X-ray detector converts X-ray into visible light. The scintillator as a major part of detector affects the imaging efficiency and resolution of the detector. Based on the Geant4 simulation platform, the Monte Carlo model was built to simulate the characteristics of CsI(Tl) scintillator under different scintillator thicknesses and different X-ray energy(20—80 keV). Furthermore, the effects of scintillator conversion efficiency and resolution with different scintillator thicknesses were calculated. Simulation results show the ideal thickness of the scintillator for the given input energy. The simulation results provide a reference for the parameter design and optimization of the scintillator.

参考文献/References

备注/Memo

备注/Memo:
收稿日期: 2017-08-10. 基金项目: 国家自然科学基金资助项目(61372144);国家重大科学仪器设备开发专项资助项目(2011YQ030112). 作者简介: 陈津平(1973—),男,博士,副教授. 通讯作者: 邹晶,副研究员,jingzoutd@tju.edu.cn.
更新日期/Last Update: 2017-12-21