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叶邦角, 李样, 周志浩. 缪子成像及元素成分分析[J]. 物理, 2021, 50(4): 248-256. DOI: 10.7693/wl20210407
引用本文: 叶邦角, 李样, 周志浩. 缪子成像及元素成分分析[J]. 物理, 2021, 50(4): 248-256. DOI: 10.7693/wl20210407
YE Bang-Jiao, LI Yang, ZHOU Zhi-Hao. Muon imaging and elemental analysis[J]. PHYSICS, 2021, 50(4): 248-256. DOI: 10.7693/wl20210407
Citation: YE Bang-Jiao, LI Yang, ZHOU Zhi-Hao. Muon imaging and elemental analysis[J]. PHYSICS, 2021, 50(4): 248-256. DOI: 10.7693/wl20210407

缪子成像及元素成分分析

Muon imaging and elemental analysis

  • 摘要: 缪子为轻子的一种,主要来源于宇宙射线和加速器。宇宙射线缪子能量高、穿透性强,是一种天然的非破坏性基本粒子“探针”,可以对物体进行成像和无损检测。加速器缪子强度高、能量可调,可以对物体快速成像。加速器产生的负缪粒子进入材料会形成缪子原子,级联跃迁产生的X射线可以对材料进行元素分析。文章介绍了宇宙射线缪子成像、加速器缪子成像和缪子原子X射线元素分析三种技术的基本原理、成像手段或分析方法,以及其主要应用、发展现状与趋势,特别介绍了中国散裂中子源在加速器缪子成像和缪子原子X射线应用研究的规划。

     

    Abstract: As a type of lepton, muons mainly come from cosmic rays or accelerators. Cosmic ray muons have high energy and strong penetrability, so that they can be regarded as a natural non- destructive fundamental particle “probe” to image and monitor objects. Accelerator-based muons have high intensities and adjustable energy, which allows them to image objects quickly. The negative muons generated by accelerators can form muonic atoms after being captured by nuclei inside materials; thereafter, the muonic atoms can radiate X-rays, from which the elemental composition of the material can be analyzed. This article reviews the basic principles of cosmic- ray muon imaging, accelerator-based muon imaging and muonic X-ray elemental analysis, as well as their major application fields and future developments. In particular, the accelerator-based muon imaging and muonic X-ray elemental analysis projects at the China Spallation Neutron Source will be presented.

     

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