国产LaBr_3:Ce晶体性能测试

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• 英文论文题名：The Test Of The Performance Of Labr_3:Ce Scintillator Produced In China
• 论文作者：刘军辉 ; 程金星 ; 徐炯辉 ; 赵锋涛 ; 温伟伟 ; 吴友朋 ; 周文平 ; 胡玉新 ; 王春安 ; 成枫锋
• 英文论文作者：Liu Junhui ; Cheng jinxing ; Xu Jionghui ; Zhao Fengtao ; Wenweiwei ; Wu Youpeng ; Zhou Wenping ; Hu Yuxin ; Wang chun'an ; Cheng Fengfeng ; The Second Artillery Equipment Institute ; Institute of Nuclear Science And New Energy Technology ; Tsinghua University ; CNNP Nuclear Power Operation Management Co. ; Ltd ; Key Lab of Beam Technology and Material Modification of Ministry of Education ; College of Nuclear Science and Technology ; Beijing Normal University ; Beijing Radiation Center
• 年：2014
• 作者机构：二炮装备研究院;清华大学核能科学与新能源技术研究院;中核核电运行管理有限公司;射线束技术与材料改性教育部重点实验室北京师范大学核科学与技术学院;北京市辐射中心;
• 论文关键词：LaBr3 ; γ谱仪
• 英文论文关键词：LaBr_3 ; gamma spectrometer
• 会议召开时间：2014-08-13
• 会议录名称：第十七届全国核电子学与核探测技术学术年会论文集
• 语种：中文
• 分类号：O614.33;O73
• 学会代码：HDZX
• 会议名称：第十七届全国核电子学与核探测技术学术年会
• 会议地点：中国甘肃兰州
• 主办单位：中国电子学会、中国核学会核电子学与核探测技术分会
• 学会名称：中国电子学会核电子学与核探测技术分会
• 页数：5
• 文件大小：647k
• 原文格式：D
• 会议级别：全国

摘要

LaBr3:Ce晶体是近年来发展起来的新晶体,有很高的发光产额(~60000p/MeV)和快的发光衰减时间常数(~16ns),因而成为热点。国内对LaBr3:Ce晶体的研究生产时间不长,也只有少数几家单位具备条件。本工作采用北京华凯龙电子有限公司生产的LaBr3:Ce晶体,晶体尺寸为Φ30mm×20mm,配合XP20D0光电倍增管,采用单光电子方法测量得到其光电子产额为16800p.e/MeV;采用单光电子方法测量了其发光衰减曲线,计算得到其上升时间为5.6ns,发光衰减时间常数为21ns;测量了其对137Cs的能量分辨率为3.3%;采用两块Φ30mm×20mm的LaBr3:Ce晶体与两只XP20D0光电倍增管,测量得到对22Na的符合时间分辨率为191ps;这些测试为国产LaBr3:Ce晶体的γ谱仪研究提供参考。
LaBr_3:Ce is a new scintillator developed recently. It has become a hot topic because of its high light yield(~60000p/MeV) and short decay time constant(~16ns). The history of the study and produce of LaBr_3:Ce is not long, and only a few of departments have the condition to do this work. In this work, the Φ30mm×20mm LaBr_3:Ce scintillator produced by Beijing Huakailong electronics Co. Ltd. was used to couple to a XP20D0 PMT. The light yield and the light decay curve were measured by the photon-electron method. The light yield is 16800 p.e/MeV and the decay constant is 21 ns. The energy resolution for ~(137)Cs source is 3.3%. Two bulks of Φ30mm×20mmLaBr_3:Ce scintillator and two XP20D0 PMTs were used to make up a time spectrometer. The time resolution FHWM 191 ps was got for ~(22)Na source. The test of the LaBr_3:Ce scintillator might be useful for people studying gamma spectrometers.

引文

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