核反恐下基于碲锌镉(CZT)探测器便携式谱仪的研制  

Development of Portable Spectrometer Based on CZT Detector Under Nuclear Anti-Terrorism

作　　者：王莹珏 刘超[1] 郑玉来[1] 田星皓 何高魁[1] 吕建友[1] WANG Yingjue;LIU Chao;ZHENG Yulai;TIAN Xinghao;HE Gaokui;LYU Jianyou(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《同位素》2021年第3期195-200,共6页Journal of Isotopes

基　　金：北京市科技计划(Z201100007720011)。

摘　　要：核恐怖活动具有隐蔽性强、危害性大、涉及面广、成分复杂等特点,一旦发生就会造成严重的人员伤亡、财产损失和社会恐慌,为了防范核恐怖主义,做好核安保工作,针对重要交通关口、国际重大活动场所等核安保过程中核素识别速度较慢的问题,本文通过对核监测设施系统整体优化设计,研制先进的核电子学模块,自主设计竞争加权算法,并应用于智能核素识别技术算法的研究,实现低剂量率条件下混合核素的快速识别,成功研制出小型化、低功耗碲锌镉(CZT)便携式谱仪。研究结果表明,本仪器测试指标为:高于本底0.5μSv/h时,单一核素^(137)Cs识别时间为2 s内,混合核素(^(241)Am、^(137)Cs、^(60)Co、^(133)Ba、^(152)Eu)识别时间为9 s内。可为核安保部门有效控制核恐怖分子提供智能快速探测技术。Nuclear terrorism has the characteristics of strong concealment,great harm,wide range and complex composition.Once it happens,it will cause serious casualties,property losses and social panic.How to prevent nuclear terrorism has become one of the focuses of nuclear security work in various countries.In view of the slow speed of nuclide identification in the process of nuclear security,such as important traffic gates and international major events,through the overall optimization design of the system,the research of nuclear electronics and intelligent nuclide identification algorithm,this paper develops the advanced nuclear electronics module through the overall optimization design of the system,and innovatively designs the competitive weighted algorithm for intelligent nuclide identification.We have successfully developed a miniaturized,low-power portable CdZnTe(CZT)spectrometer.When the test index is 0.5μSv/h higher than the background,the identification time of single nuclide 137 Cs is within 2 seconds,and that of mixed nuclides(^(241)Am,^(137)Cs,^(60)Co,^(133)Ba,^(152)Eu)is within 9 seconds.It can provide intelligent and fast detection technology for nuclear security department to effectively control nuclear terrorists.

关 键 词：便携式谱仪 碲锌镉 核安保 核恐怖主义 

分 类 号：TL816.3[核科学技术—核技术及应用]