A single-pixel elemental imaging method using neutron-induced gamma-ray activation  

作　　者：Can Cheng Yong-Ji Xie Xun-Rong Xia Jia-Yu Gu Dong Zhao Yi-Ze Chen Ai-Yun Sun Xu-Wen Liang Wen-Bao Jia Da-Qian Hei 

机构地区：[1]Department of Ionizing Radiation and Medical Engineering,Jiangsu Institute of Metrology,Nanjing 210023,China [2]Institute of Nuclear Analytical Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China [3]China Nuclear Power Engineering Co.,Ltd,Beijing 100840,China [4]School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China

出　　处：《Nuclear Science and Techniques》2025年第1期1-12,共12页核技术(英文)

基　　金：supported by the National Natural Science Foundation of China(Nos.12105143 and 11975121);the China Postdoctoral Science Foundation(No.2023M741453);the Engineering Research Center of Nuclear Technology Application(No.HJSJYB2020-1);the Key Laboratory of Ionizing Radiation Metering and Safety Evaluation for Jiangsu Province Market Regulation,and the Jiangsu Province Excellent Postdoctoral Program(No.JB23057).

摘　　要：Neutron-induced gamma-ray imaging is a spectroscopic technique that uses characteristic gamma rays to infer the elemental distribution of an object.Currently,this technique requires the use of large facilities to supply a high neutron flux and a time-consuming detection procedure involving direct collimating measurements.In this study,a new method based on low neutron flux was proposed.A single-pixel gamma-ray detector combined with random pattern gamma-ray masks was used to measure the characteristic gamma rays emitted from the sample.Images of the elemental distribution in the sample,comprising 30×30 pixels,were reconstructed using the maximum-likelihood expectation-maximization algorithm.The results demonstrate that the elemental imaging of the sample can be accurately determined using this method.The proposed approach,which eliminates the need for high neutron flux and scanning measurements,can be used for in-field imaging applications.

关 键 词：Elemental imaging Neutron-induced gamma-ray activation Single-pixel imaging 

分 类 号：O571.323[理学—粒子物理与原子核物理] TP391.41[理学—物理]