A modified multi-group model of angular and momentum distribution of cosmic-ray muons for thickness measurement and material discrimination of slabs

Sa Xiao; Wei-Bo He; Ming-Cong Lan; Ying Chen; Mao-Bing Shuai

doi:10.1007/s41365-018-0363-7

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A modified multi-group model of angular and momentum distribution of cosmic-ray muons for thickness measurement and material discrimination of slabs

NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH | Updated：2021-02-07

- A modified multi-group model of angular and momentum distribution of cosmic-ray muons for thickness measurement and material discrimination of slabs
- Nuclear Science and Techniques Vol. 29, Issue 2, Article number: 28(2018)
- Affiliations：
  
  1.Institute of Materials, China Academy of Engineering Physics, Jiangyou 621907, China
  2.Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621900, China
- Author bio：
  
  Corresponding author, shuaimaobing@caep.cn
- Funds：
- DOI：10.1007/s41365-018-0363-7
  CLC：
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Sa Xiao, Wei-Bo He, Ming-Cong Lan, et al. A modified multi-group model of angular and momentum distribution of cosmic-ray muons for thickness measurement and material discrimination of slabs. [J]. Nuclear Science and Techniques 29(2):28(2018)
DOI：

Sa Xiao, Wei-Bo He, Ming-Cong Lan, et al. A modified multi-group model of angular and momentum distribution of cosmic-ray muons for thickness measurement and material discrimination of slabs. [J]. Nuclear Science and Techniques 29(2):28(2018) DOI： 10.1007/s41365-018-0363-7.

摘要

Abstract

Muon tomography is a capable imaging technique to measure the geometry of high-,Z, objects. However, most existed algorithms used in muon tomography have obscured the effects of angular distribution and momentum spectra of cosmic ray muons and reduced the spatial resolution. We present a modified multi-group model that takes into account these effects and calibrates the model by the material of lead. Performance tests establish that the model is capable of measuring the thickness of a Pb slab and identifying the material of an unknown slab on a reasonable exposure timescale, in both cases of complete and incomplete angular data. Results show that the modified multi-group model is helpful for improvements of image resolution in real applications.

关键词

Keywords

Muon tomographyModified multi-group modelAngular distributionMomentum spectra

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