伴随粒子中子检测系统发展及应用  

Development and application of a spatial associated particle neutron detection system

作　　者：叶龙建 张东东[1] 杨振 陈宇航 YE Longjian;ZHANG Dongdong;YANG Zhen;CHEN Yuhang(Dalian University of Technology,Dalian 116024,China;Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China;Sun Yat-sen University,Guangzhou 519082,China;Graduate School,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]大连理工大学,大连116024 [2]中国工程物理研究院流体物理研究所,绵阳621900 [3]中山大学,广州519082 [4]中国工程物理研究院研究生院,绵阳621900

出　　处：《核技术》2024年第2期1-14,共14页Nuclear Techniques

基　　金：国家自然科学基金(No.11975217)资助。

摘　　要：基于快中子技术的无损检测方法能够在不对检测物造成影响的情况下,发现其隐藏的危险品。利用D-T反应时伴随中子产生的反冲α粒子对有效中子进行标记,可大幅提高中子探测信噪比,同时通过空间分辨α粒子还可以获得被检测对象特征元素的空间信息,所以基于伴随α粒子的中子检测方法在安检领域具有重要的应用前景。本文简单介绍了基于伴随α粒子中子检测方法的原理和系统组成,并对系统的中子管、α粒子探测器和γ探测器等关键部件进行了介绍,接着介绍了目前世界上正在研究的伴随α粒子中子检测系统及其进展,最后对这种检测方法进行了展望。Generally,non-destructive testing methods based on the fast neutron technology,such as the associated alpha particle detection technology,can detect hidden hazardous materials without affecting the detected object.The effective neutrons are labeled by recoil alpha particles produced in a D-T reaction,which can significantly improve the signal-to-noise ratio of neutron detection.Meanwhile,the spatial information of the detected object can be obtained based on the spatial resolution of alpha particles.Therefore,neutron detection methods based on accompanying alpha particles have important application prospects in the field of security inspection.The principle and system composition of the neutron detection method based on associated alpha particles are briefly introduced herein.Then,key components of the detection system,such as the neutron tube,alpha particle detector,and gamma detector,are described.Next,the associated alpha particle neutron detection system,which is being studied worldwide,and its progress are presented.Finally,the prospects of this detection method are discussed.

关 键 词：安全检测 伴随粒子 中子管 α粒子探测器 Γ探测器 

分 类 号：TL99[核科学技术—核技术及应用]