基于可移动中子源的瞬发γ活化成像研究进展  

Advances in Prompt Gamma Activation Imaging Based on a Removable Neutron Source

作　　者：程璨 赵冬[2] 梁旭文[2] 杨晓艳 贾文宝 夏勋荣[1] 顾加雨 CHENG Can;ZHAO Dong;LIANG Xuwen;YANG Xiaoyan;JIA Wenbao;XIA Xunrong;GU Jiayu(Jiangsu Institute of Metrology(Jiangsu Energy Measurement Data Center),Nanjing,Jiangsu 210023,China;Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 211106,China;Inner Mongolia Institute of Metrology and Testing Research,Hohhot,Inner Mongolia 010040,China)

机构地区：[1]江苏省计量科学研究院(江苏省能源计量数据中心),南京210023 [2]南京航空航天大学,南京211106 [3]内蒙古自治区计量测试研究院,呼和浩特010040

出　　处：《中国无机分析化学》2024年第6期749-757,共9页Chinese Journal of Inorganic Analytical Chemistry

基　　金：国家自然科学基金资助项目(12105143,42374226,11975121);中国博士后科学基金资助项目(2023M741453);江苏省市场监督管理局科技计划项目(KJ2024009,KJ2024044,KJ2023015)。

摘　　要：瞬发γ活化成像技术基于瞬发γ射线中子活化分析,结合准直测量或者伴随粒子测量手段,以实现对样品内部中元素位置分布的测量。当前大多数相关研究都是基于大型中子源开展的,这限制了该技术的应用场景,可移动小型化中子源是该技术现场应用的必然要求。基于可移动中子源的瞬发伽马活化成像技术按照准直方式可分为基于单孔准直、编码孔准直及伴随粒子测量三类,对其技术原理、研究进展及仍存在的问题进行介绍与讨论。目前的技术在空间分辨率上还需要进一步提升,未来将进一步结合图像处理算法提高成像质量并降低测量时间。The prompt gamma activation imaging technique is based on prompt gamma-ray neutron activation analysis,combined with collimation or associated particle measurements to measure the position distribution of the elements in the sample.Currently,most of the related researches are carried out based on large neutron sources,which limits the application scenarios of this technique,and the mobile miniaturized neutron source is an inevitable requirement for the field application of this technique.The prompt gamma activation imaging technique based on the movable neutron source can be divided into three categories according to the collimation method,which are based on single-hole collimation,coded-hole collimation,and accompanying particle measurement.The technical principle,research progress and existing problems are introduced and discussed in this paper.The spatial resolution still needs to be improved.In the future,it will be further combined with image processing algorithms to improve the imaging quality and reduce the measurement time.

关 键 词：可移动中子源 瞬发伽马射线 元素分布成像 位置分辨率 

分 类 号：O657.35[理学—分析化学] TL99[理学—化学]