便携式α-β-γ谱仪设计  

Design of portableα-β-γspectrometer

作　　者：刘怡文 赵朝阳 王玉东[1] 熊浩 杨锋[1] 董春辉 王忠海[1] 周荣[1] 杨朝文[1] LIU Yi-Wen;ZHAO Chao-Yang;WANG Yu-Dong;XIONG Hao;YANG Feng;DONG Chun-Hui;WANG Zhong-Hai;ZHOU Rong;YANG Chao-Wen(Key Laboratory of Radiation Physics and Technology,Ministry of Education,College of Physics,Sichuan University,Chengdu 610064,China)

机构地区：[1]四川大学物理学院辐射物理与技术教育部重点实验室,成都610064

出　　处：《四川大学学报（自然科学版）》2020年第5期947-952,共6页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金(11475121)。

摘　　要：现有便携式谱仪无法同时对α-β-γ射线进行测量,这使得相关人员对α-β-γ混合场景的评估与处理存在不便,因此我们研制了一套便携式α-β-γ谱仪以解决上述问题.谱仪采用PIPS探测器和LaBr3(Ce)探测器分别对α-β粒子和γ射线进行测量,获取高分辨的能谱.经测试,谱仪的α能量分辨率小于140keV(5.486 MeV,0.1atm),α表面发射率响应67.34%(241Am),β表面发射率响应19.13%(90Sr-90Y),γ能量分辨率小于3.4%(662keV).因此谱仪可同时测量α-β-γ射线并获取高分辨的能谱,有助于相关人员对测量现场做出快速准确的评估与处理.The existing portable spectrometer cannot measure theα-β-γray at the same time,which makes the evaluation and processing of theα-β-γmixed scene inconvenient,so a portableα-β-γspectrometer is developed to solve the problem.The spectrometer uses a PIPS detector and a LaBr3(Ce)detector to measureα-βparticles andγ-rays,respectively,to obtain a high-resolution energy spectrum.The main properties of the spectrometer such asαenergy resolution,α/βsurface emissivity response,γenergy resolution and temperature stability were tested.Theαenergy resolution is less than 140keV(5.486meV,0.1atm),surface emissivity response ofαparticles is 67.34%(241Am),surface emissivity response ofβparticles is 19.13%(90Sr-90Y),andγenergy resolution is less than 3.4%(662keV).Therefore,the spectrometer can simultaneously measure theα-β-γrays and obtain the high resolution energy spectrum,which is helpful for the related personnel to make rapid and accurate evaluation and treatment of the measurement site.

关 键 词：便携式谱仪 PIPS探测器 LaBr3(Ce)探测器 

分 类 号：TL817.2[核科学技术—核技术及应用]