引力波伽马射线暴探测用大尺寸溴化镧晶体封装件的制备及性能研究

人工晶体学报 ›› 2023, Vol. 52 ›› Issue (3): 414-420.

引力波伽马射线暴探测用大尺寸溴化镧晶体封装件的制备及性能研究

赵美丽¹, 孙涛峰¹, 桂强¹, 张春生¹, 王树印¹, 刘珊^1,2, 李新乔³, 安正华³, 杨生³

1.北京玻璃研究院有限公司,北京 101111;
2.北京一轻研究院有限公司,北京 101111;
3.中国科学院高能物理研究所,北京 100043

收稿日期:2022-11-25 出版日期:2023-03-15 发布日期:2023-04-06
作者简介:赵美丽(1995—),女,河北省人,工程师。E-mail:zhaomeilizm@163.com
基金资助:
国家重点研发计划(2022YFB3503603)

Preparation and Properties of Large Size LaBr₃ Crystal Packages for Gravitational Wave Gamma-Ray Burst Detection

ZHAO Meili¹, SUN Taofeng¹, GUI Qiang¹, ZHANG Chunsheng¹, WANG Shuyin¹, LIU Shan^1,2, LI Xinqiao³, AN Zhenghua³, YANG Sheng³

1. Beijing Glass Research Institute Co., Ltd., Beijing 101111, China;
2. Beijing Industrial Technology Research Institute Co., Ltd., Beijing 101111, China;
3. Institute of High Energy Physics Chinese Academy of Science, Beijing 100043, China

Received:2022-11-25 Online:2023-03-15 Published:2023-04-06

摘要/Abstract

摘要： 本文采用改进的坩埚下降法生长了ϕ76 mm×76 mm的以氯化铈(CeCl₃)为掺质的溴化镧(LaBr₃)晶体。该晶体经切割、研磨加工、封装制成超薄铍(Be)金属LaBr₃晶体防潮封装件,封装件的晶体尺寸为ϕ76 mm×15 mm,入射窗选用200 μm厚的Be金属片,当入射能量为5.9 keV时能量分辨率为55%。对封装件依次开展力学(1 000 g冲击、14.12 g随机振动)、热真空(-40~+50 ℃、≤1.3×10^-3 Pa)、辐照(160 krad剂量⁶⁰Co辐照)试验,并对试验前后封装件进行闪烁性能表征。结果表明,试验前后晶体外观无肉眼可见变化,662 keV的能量分辨率由5.30%变至4.89%,光输出损失0.2%。

关键词: 溴化镧晶体, 铍金属, 坩埚下降法, 闪烁晶体, 辐射探测, 封装

Abstract: The ϕ76 mm×76 mm LaBr₃ crystal doped with CeCl₃ was grown by modified Bridgman technique. The crystal was cut and ground to ϕ76 mm×15 mm, and packed in a housing to prevent hygroscopic effects. The entrance window was comprised of a 200 μm thick Be sheet. The energy resolution of package is 55% under 5.9 keV gamma-ray excitation. The scintillation performance of the package was characterized before and after mechanical test (1 000 g impact and 14.12 g random vibration), thermal vacuum test (-40~+50 ℃, ≤1.3×10^-3 Pa), and irradiation test (160 krad dose of ⁶⁰Co irradiation). The results show that there is no change in the appearance of crystal. The energy resolution of the package changes from 5.30% to 4.89% under 662 keV gamma-ray excitation, the light output loss is 0.2%.

Key words: LaBr₃ crystal, beryllium metal, Bridgman method, scintillation crystal, radiation detection, encapsulation

中图分类号:

O782
O614.33

赵美丽, 孙涛峰, 桂强, 张春生, 王树印, 刘珊, 李新乔, 安正华, 杨生. 引力波伽马射线暴探测用大尺寸溴化镧晶体封装件的制备及性能研究[J]. 人工晶体学报, 2023, 52(3): 414-420.

ZHAO Meili, SUN Taofeng, GUI Qiang, ZHANG Chunsheng, WANG Shuyin, LIU Shan, LI Xinqiao, AN Zhenghua, YANG Sheng. Preparation and Properties of Large Size LaBr₃ Crystal Packages for Gravitational Wave Gamma-Ray Burst Detection[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(3): 414-420.

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