The effect of rock composition on muon tomography measurements

Alessandro Lechmann, David Mair, Akitaka Ariga, Tomoko Ariga, Antonio Ereditato, Ryuichi Nishiyama, Ciro Pistillo, Paola Scampoli, Fritz Schlunegger, Mykhailo Vladymyrov

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

In recent years, the use of radiographic inspection with cosmic-ray muons has spread into multiple research and industrial fields. This technique is based on the high-penetration power of cosmogenic muons. Specifically, it allows the resolution of internal density structures of large-scale geological objects through precise measurements of the muon absorption rate. So far, in many previous works, this muon absorption rate has been considered to depend solely on the density of traversed material (under the assumption of a standard rock) but the variation in chemical composition has not been taken seriously into account. However, from our experience with muon tomography in Alpine environments, we find that this assumption causes a substantial bias in the muon flux calculation, particularly where the target consists of high {Z2/A} rocks (like basalts and limestones) and where the material thickness exceeds 300m. In this paper, we derive an energy loss equation for different minerals and we additionally derive a related equation for mineral assemblages that can be used for any rock type on which mineralogical data are available. Thus, for muon tomography experiments in which high {Z2/A} rock thicknesses can be expected, it is advisable to plan an accompanying geological field campaign to determine a realistic rock model..

本文言語英語
ページ(範囲)1517-1533
ページ数17
ジャーナルSolid Earth
9
6
DOI
出版ステータス出版済み - 12 21 2018

All Science Journal Classification (ASJC) codes

  • Soil Science
  • Geophysics
  • Geology
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Stratigraphy
  • Palaeontology

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