Ar-CF_4重离子激发下发光时间特性实验研究

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• 英文论文题名：Experimental study of Ar-CF_4 time characteristics under heavy ions excitation
• 论文作者：刘金良 ; 胡静 ; 陈亮 ; 张忠兵 ; 阮金陆 ; 张显鹏 ; 何世熠 ; 金鹏 ; 欧阳晓平
• 英文论文作者：LIU Jin-Jiang ; HU Jing ; CHEN Liang ; ZHANG Zhong-bing ; Ruan Jin-lu ; ZHANG Xian-peng ; HE Shi-yi ; JIN Peng ; OU YANG Xiao-ping ; Northwest Institute of Nuclear Technology ; Department of Engineering Physics ; TsingHua University
• 年：2015
• 作者机构：西北核技术研究所;清华大学工程物理系;
• 论文关键词：气体闪烁体 ; 氩气 ; 四氟化碳 ; 时间响应特性
• 英文论文关键词：gas scintillator ; argon ; carbon-tetrafluoride ; time charateristic
• 会议召开时间：2015-09-21
• 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第7册（计算物理分卷、核物理分卷、粒子加速器分卷、核聚变与等离子体物理分卷、脉冲功率技术及其应用分卷、辐射物理分卷）
• 语种：中文
• 分类号：TL812.3
• 学会代码：EGVD
• 会议名称：中国核学会2015年学术年会
• 会议地点：中国四川绵阳
• 主办单位：中国核学会
• 学会名称：中国核学会
• 页数：7
• 文件大小：337k
• 原文格式：O
• 会议级别：全国

摘要

气体闪烁探测器具有许多独特优势,近年来逐渐成为核辐射探测、粒子物理实验研究最重要探测器之一。采用单光子计数法,测量了质子、α粒子、Li~(3+)等几种重离子激发下的Ar、CF_4及其混合气体的衰减时间特性。实验结果表明,Ar和CF_4的有效衰减时间随入射粒子不同而变化;随掺入CF_4浓度增加,Ar+CF_4混合气体的衰减时间先逐渐增大,达到峰值后再逐渐减小,混合气体总体有效衰减时间在5~14 ns之间。基于Ar、CF_4的闪烁探测器可实现粒子甄别,且改变CF_4浓度可调节Ar+CF_4的有效衰减时间,这对Ar-CF_4闪烁体应用于单粒子和快脉冲测量具有重要意义。
Gas detectors have been one of the most important detectors in nuclear radiation detection and particle physics experiments for the unique properties of noble gases.We measured the time characteristics of Ar,CF_4 and their mixtures under proton,alpha particle and Li~(3+) ions excitation by the method of single photon counting.The experimental results show that the effective decay time of Ar and CF_4 changes with different incident particles.The effective decay time of Ar-CF_4 gas mixtures changes in the range 5~14 ns.Initially,the effective decay time of Ar+CF_4 gas mixtures increases when the concentration of CF_4 increases.When the concentration of CF_4 exceeds a certain threshold,the effective decay time decreases to that of pure CF_4 gradually.The Ar and CF_4 gas scintillator may be used for particle identification.And the effective decay time of Ar-CF_4 mixtures can be adjusted by changing the concentration of CF_4.This is a great significance for single particle detection and fast pulsed radiation detection.

引文

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