无人机载CeBr_(3)探测器监测系统研制及性能测试  

Development and performance test of unmanned aerial vehicle-borne CeBr_(3) radiation monitoring system

作　　者：房江奇[1,2] 安政伟 张文峰 刘林峰[1,2] 杨金政 刘学 李江坤[1,2] FANG Jiangqi;AN Zhengwei;ZHANG Wenfeng;LIU Linfeng;YANG Jinzheng;LIU Xue;LI Jiangkun(Airborne survey and remote sensing center of nuclear industry,Shijiazhuang 050002 China;CNNC Engineering technology research center of airborne monitoring for nuclear emergency,Shijiazhuang 050002 China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]中核核应急航空监测工程技术研究中心,河北石家庄050002

出　　处：《中国辐射卫生》2024年第1期80-86,共7页Chinese Journal of Radiological Health

基　　金：2021—2024年核能开发项目资助([2023]336号)。

摘　　要：目的 研制探测效率高、具有核素识别功能的无人机载辐射监测系统,用于核事故应急监测情况下的核素识别。方法 本文采用4个CeBr_(3)(溴化铈)晶体探测器和SiPM(硅光电倍增管)为主要硬件,同时采用集成化模块、智能化电子器件、新型复合材料等,研制无人机载CeBr_(3)探测器监测系统。结果 通过对系统各项性能进行测试,晶体能量分辨率优于5%(@0.662MeV)、能谱峰漂小于±1道、能量线性拟合度0.999 97、12 h长时间测量各能窗计数变化均不超过5%,和同体积的NaI(Tl)探测器相比,具有较高的探测效率。结论 通过地面点源测试分析及理论计算,系统具有可靠的对核素的识别能力。此系统可在核素识别、核与辐射事故应急与准备方面发挥作用。Objective To develop an unmanned aerial vehicle(UAV)-borne radiation monitoring system with high detection efficiency and nuclide identification ability for airborne monitoring in nuclear emergency.Methods The UAV-borne CeBr_(3) radiation monitoring system was composed of four cerium bromide(CeBr_(3))crystal detectors coupled with silicon photomultipliers(SiPMs)and other components including integrated modules,intelligent electronic devices,and new composite materials.Results According to various performance tests on the system,the crystal energy resolution was better than 5%(@0.662 MeV),the peak drift of the energy spectrum was within±1 channel,the linear fit of energy was 0.99997,the change in the count rate of each energy window during 12 h long-term measurement was less than 5%,and the detection efficiency was higher compared with that of NaI(Tl)detectors of the same volume.Conclusion Through ground point source testing and theoretical calculation,the system has reliable ability to identify radionuclides,which can be used in nuclide identification and the preparedness and response for nuclear and radiation emergencies.

关 键 词：溴化铈 硅光电倍增管 能量分辨率 无人机 

分 类 号：X591[环境科学与工程—环境工程]