期刊论文

Wang, Xiaodong

中文

原子能科学技术

1000-6931

2022

56

10

2214-2222

10.7538/yzk.2021.youxian.0989

2020YFE0202001:中国科学技术部基金 11875163:国家自然科学基金 2021JJ20006:湖南省自然科学基金项目

本校为第一机构

缪子成像是一种利用天然本底辐射中极具穿透力的缪子射线通过散射或透射技术对高原子序数Z或隐藏物体进行无损成像的技术。当前的研究对象是大尺寸的高Z物质,而针对小尺寸的中低Z物质的成像技术在国内鲜见报道。本文提出了一种针对小尺寸中低Z物质的三维成像技术,利用Geant4软件模拟了缪致次级粒子的产生过程,模拟结果表明次级粒子主要为电子和γ光子,通过缪致次级粒子与入射缪子符合探测技术筛选入射缪子径迹,利用有限角度成像算法对待测物体进行了三维图像重建,结果表明,该技术适合于小尺寸的中低Z物质成像,尤其对小尺寸中Z物质的重建效果明显,重建图像可区分0.8 cm的凹槽。

Cosmic-ray muon imaging is a new non-destructive technique that uses highly penetrating natural muon to reconstruct objects with high atomic number (Z) or subjects hidden in something by applying muon scattering or transmission technique, respectively. Up till now, muography mainly focused on objects with high Z or large volume. But few studies have been reported on objects at small scale with low or medium Z in China. A method that aims to reconstruct 3D image for objects at small scale as well as low or medium Z has been brought out in this p...