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新型溴化镧闪烁晶体探测器研制 被引量:3

Preparation and Performance of New LaBr_3 Scintillation Crystal Detector
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摘要 采用优选的封装材料及优化的工艺,将Φ1.5"×1.5"的LBC闪烁晶体与R6231-100光电倍增管直接耦合,并整体封装在铝合金外壳中,制成新型溴化镧闪烁晶体探测器。该探测器的能量分辨率为2.8%(^(137)Cs),在500 keV^1400 keV范围内能量响应的非线性为0.96%,脉冲幅度随探头方向的变化量为0.2%,在-30至+40℃范围内脉冲幅度输出的温度系数为-0.65%/℃。探测器除了来自于^(138)La的0.077cm^(-3).s^(-1)本底辐射外,还有来源于^(227)Ac及其子体的0.99cc^(-1).s^(-1)本底辐射。 With optimized material mid packaged technology, a new LaBr3 scintillation crystal detector for γ rays is presented. It consists mainly of one piece of Ф1.5" × 1.5" LaBr3 : 5% CeCl3 scintillation crystal and a 1:1.6231 -100 PMT, which are coupled with each other by organic silicone resin, then sealed integrally in Alalloy housing. The scintillation detector has an excellent energy resolution (FWHM) of 2.8% at 662 keV, 0.96% non - proportionality of energy response between 500 - 1400 keV, 0.2% change of? pulse height with different directions, and -0.65%/℃ change of? pulse height with temperature between -30℃ and +40℃. It has an internal activity of up to 0.99 eps/ec which result from ^227Ae and its daughters and maybe further re- duced soon, besides that of about 0. 077 eps/ccfrom 138La isotope.
作者 邹本飞 张明荣 杭利军 张春生 桂强 ZOU Ben- fei ZHANG Ming- rong HANG Li- jun ZHANG Chun -sheng GUI Qiang(Beijing Glass Research Institute, Beijing 101111, Chain)
机构地区 北京玻璃研究院
出处 《核电子学与探测技术》 北大核心 2016年第12期1210-1214,共5页 Nuclear Electronics & Detection Technology
关键词 溴(氯)化镧(铈)闪烁晶体 闪烁探测器 能量分辨率 能量非线性 增益漂移 温度系数 LaBr3:5 % CeC13 scintillation crystal scintillation detectors energy resolution energy, non - propor- tionality temperature effect
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