无人机载LaBr_(3)(Ce)探测器对点源的最小可探测活度研究  

Study on the Detection Capability of the UAV-borne LaBr_(3) Detector for the Point Source

作　　者：杨金政[1] 刘学 刘林峰 房江奇[1] YANG Jinzheng;LIU Xue;LIU Linfeng;FANG Jiangqi(ARCN,Shijiazhang of Hebei Prov.050011,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050011

出　　处：《核科学与工程》2024年第1期243-249,共7页Nuclear Science and Engineering

摘　　要：随着核能与核技术应用的不断发展,对无人机载航空测量设备提出了新的要求。LaBr_(3)(Ce)探测器以其优良的能量分辨率(<3%@661.2 keV)以及较高的探测效率受到了特别的关注。本文通过开展对LaBr_(3)(Ce)探测器的性能测试及无人机载飞行实验,对2″×φ2″英寸LaBr_(3)(Ce)探测器在不同条件下对点源的探测能力进行了研究。测试内容主要包括对LaBr_(3)(Ce)探测器的本底测试、探测效率测试、角响应测试等。飞行实验包括在不同辐射本底下的不同高度、不同速度、不同偏航距的飞行测试。确定了2″×φ2″英寸LaBr_(3)(Ce)探测器在K为557.01 Bq/kg、U为17.64 Bq/kg、Th为29.41 Bq/kg的辐射背景场下,不同飞行条件时探测器对~(137)Cs点源的最小可探测活度。With the continuous development of nuclear energy and nuclear technology applications.New requirements are put forward for unmanned aerial survey equipment.The LaBr_(3)(Ce)detector has attracted special attention for its excellent energy resolution(<3%@661.2 keV)and high detection efficiency.In this paper,the performance test of the LaBr_(3)(Ce)detector and the UAV-borne flight experiment are carried out.The detection ability of the 2″×φ2″inch LaBr_(3)(Ce)detector for the point source under different conditions was studied.The test contents mainly include the low background test,detection efficiency test,and angular response test of the LaBr_(3)(Ce)detector.Flight experiments include flight tests at different altitudes,different speeds,and different yaw distances under different radiation backgrounds.Under the radiation background field of K=557.01 Bq/kg,U=17.64 Bq/kg and Th=29.41 Bq/kg,the minimum detectable activity of a 2″×φ2″-inch LaBr_(3)(Ce)detector against a point source was determined.

关 键 词：LaBr_(3)(Ce)探测器 点源 探测能力 

分 类 号：TL48[核科学技术—核技术及应用]