核反恐下基于碲锌镉(CZT)探测器便携式谱仪的研制

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...

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

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 0.5 μSv/h higher than the background, the identification time of single nuclide ¹³⁷Cs is within 2 seconds, and that of mixed nuclides (²⁴¹Am, ¹³⁷Cs, ⁶⁰Co, ¹³³Ba, ¹⁵²Eu) is within 9 seconds. It can provide intelligent and fast detection technology for nuclear security department to effectively control nuclear terrorists.