摘要
"β-γ符合法是全面禁止核试验条约放射性核素监测中惰性气体氙同位素的一种重要测量方法。文中针对"β-γ符合法测量放射性氙同位素时塑料闪烁体"探测器存在严重的"记忆效应"难题,采用真空镀膜方法,在塑料闪烁体内表面镀上一定厚度的铝、铜、金等薄膜,有效地减小了氙在塑料闪烁体中的残留,使氙"记忆效应"降低至1.0%以下,显著提高了氙样品的测量准确度和探测灵敏度。
The ＂β-γ coincidence technique is a kind of key important method to detect radioactive xenon isotopes for the Comprehensive Nuclear-Test-Ban Treaty（CTBT）. As ＂detector with plastic scintillator,it has badly memory effects to measure the xenon isotopes by ＂β-γ coincidence method. This paper describes in detail metallization of plastic scintillator to reduce xenon memory effects. In the vacuum condition,the inner side of plastic scintillators were coated aluminium,copper and gold. The metal film thickness of plastic scintillators is about 1-2 mm. By -（133）Xe and -（131m）Xe,the validity of plastic scintillators coated metal was tested. The xenon memory effects of plastic scintillators coated metal has been reduced greatly,and it is less than 1.0%. Metallization can availably mitigate xenon memory effects of plastic scintillator,so it can observably improve the degree of accuracy and sensitivity for radioactive xenon isotopes measurement.
作者
贾怀茂
李奇
王世联
张新军
樊元庆
赵允刚
王军
JIA Huai-mao;LI Qi;WANG Shi-lian;ZHANG Xin-jun;FAN Yuan-qing;ZHAO Yun-gang;WANG Jun(CTBT Beijing National Data Centre and Radionuclide Laboratory, Beijing 100085, China)
出处
《核电子学与探测技术》
北大核心
2017年第10期1007-1011,共5页
Nuclear Electronics & Detection Technology
关键词
全面禁止核试验条约
氙“记忆效应”
金属镀膜法
comprehensive nuclear-test-ban treaty（CTBT）
xenon memory effects
metallization
作者简介
贾怀茂（1972-），男，内蒙古包头人，副研究员，博士，现主要从事放射性核素核查技术研究。E—mail：mousejia@sohu．com。
