基于碲锌镉探测器的便携式核素识别仪研制  

Development of a portable radiation detector for nuclide identification based on CdZnTe

作　　者：熊文俊 颜强 王莹[3] 黄金峰 钟华强 XIONG Wenjun;YAN Qiang;WANG Ying;HUANG Jinfeng;ZHONG Huaqiang(Ratection Co.,LTD.,Guangzhou,Guangzhou 510000 China;Shenzhen University,Shenzhen 518060 China;China Institute of Atomic Energy,Beijing 102413 China)

机构地区：[1]广州兰泰胜科技有限公司,广东广州510000 [2]深圳大学,广东深圳518060 [3]中国原子能科学研究院,北京102413

出　　处：《中国辐射卫生》2023年第4期387-392,共6页Chinese Journal of Radiological Health

摘　　要：目的研制具有低能γ核素识别功能的便携式核素识别仪,用于快速测量低能辐射场的剂量水平,和确定核素种类信息。方法基于室温半导体碲锌镉探测器研制了一套国产数字化多道电路,通过智能核素识别算法实现了核素识别,并使用能量响应函数G(E)计算实时周围剂量当量率H*(10)。结果便携式能谱仪可测能量下限可达20 keV,对低能X射线典型能量分辨率好于4.10%@59.5 keV@20℃,可准确识别241Am核素。结论该设备对于低能γ/X射线具有很好的测量性能,能够有效弥补当前现有设备在低能辐射场监测中的不足,为乏燃料后处理厂或核材料生产厂场所监测和应急监测提供技术手段。Objective To develop a portable nuclear radiation detector with low-energyγ-nuclide recognition capability for rapid measurement of the dose levels in low-energy radiation fields and identification of nuclides.Methods A digital multi-channel circuit was developed for a detector based on the room temperature semiconductor cadmium zinc telluride,nuclide recognition was achieved using an intelligent nuclide recognition algorithm,and the energy response function G(E)was used to calculate the real-time ambient dose equivalent rate H*(10).Results The portable spectrometer had a minimum detectable energy of 20 keV,and the typical energy resolution for low-energy X-rays was>4.10%at 59.5 keV and 20℃,enabling accurate identification of 241Am nuclide.Conclusion The device has a good measurement performance for lowenergyγ/X rays,effectively addressing the limitations of existing devices for monitoring low-energy radiation fields,and provide reliable technical methods for monitoring and emergency response in spent fuel reprocessing plants or nuclear material production plants.

关 键 词：辐射监测 碲锌镉探测器 G(E)函数 周围剂量当量率H*(10) 辐射定位 核素识别 

分 类 号：TL814[核科学技术—核技术及应用]