基于溴化镧(LaBr_(3))探测器的无人机在口岸货场放射性检测中的应用  

Application of UAV aerial survey using LaBr_(3)in radioactive detection of port freight yard

作　　者：万永亮 铁列克·波拉夏克 李准 成智威 凯依赛尔·阿布都外力 WAN Yongliang;TIE Lieke·bolaxiake;LI Zhun;CHENG Zhiwei;KAI Yisaier·abuduwaili(Customs Technology Center,Urumqi 830063;China Nuclear Security Technology Co.,Beijing 102206)

机构地区：[1]乌鲁木齐海关技术中心,乌鲁木齐830063 [2]北京中智核安科技有限公司,北京102206

出　　处：《辐射防护》2023年第5期490-494,共5页Radiation Protection

基　　金：新疆维吾尔自治区重点研发计划项目(2019B00002)。

摘　　要：详细介绍了配备溴化镧探测器的无人机放射性检测系统的组成,并对能量进行校准,对能量分辨率、本底进行了测试。应用蒙特卡罗方法计算系统测量点源探测效率和土壤体源转换系数,计算了其测量时间1500 s对点源和体源的最小可探测活度。结果表明,该系统对^(137)Cs 661.7 keV的分辨率达到2.75%,测量时间1500 s对^(137)Cs点源和体源的最小可探测活度分别为2.37 kBq、3.77 Bq/kg。现场实际应用表明,该系统能够应用于口岸货场中放射性检测工作。This paper introduces in detail the composition of UAV radioactive aerial survey system equipped with LaBr_(3)detector.The radiation energy is calibrated and the energy resolution and background are tested with the UAV system.The Monte Carlo method is applied to calculate the detection efficiency and conversion coefficient of measuring point source and soil bulk source.The minimum detectable activity(MDA)of the system for point source and volume source at 1500 s measurement time is calculated.The result shows that the energy resolution of ^(137) Cs 661.7 keV is 2.75%.MDA of ^(137) Cs point source and bulk source is 2.4 kBq and 3.8 Bq/kg,respectively,at 1500 s measurement time.The field application shows that,this system can be flexibly applied to radioactive detection in port freight yard.

关 键 词：溴化镧 放射性检测 远距离遥控 核素识别 

分 类 号：X837[环境科学与工程—环境工程]