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Study of the primary cosmic ray composition around the knee of the energy spectrum
Journal article   Open access   Peer reviewed

Study of the primary cosmic ray composition around the knee of the energy spectrum

M. Aglietta, B. Alessandro, P. Antonioli, F. Arneodo, L. Bergamasco, M. Bertaina, A.Campos Fauth, C. Castagnoli, A. Castellina, C. Cattadori, …
Physics letters. B, v 337(3), pp 376-382
1994
url
https://doi.org/10.1016/0370-2693(94)90991-1View
Published, Version of Record (VoR)Open Access (License Unspecified) Open

Abstract

A study of the primary cosmic ray composition in the energy range 5ṡ10 14−5ṡ10 15 eV is performed through the analysis of the deep underground muons and of the e.m. component of Extensive Air Showers detected in coincidence by the MACRO and EAS-TOP experiments at the Gran Sasso Laboratory. We conclude that: a) pure proton and Iron primary beams are excluded by the experimental data; b) a fraction of nuclei heavier than Helium is necessary to explain the experimental data both below and above the knee; c) a mixed composition, obtained a priori from extrapolations of the spectra directly measured below 100 TeV, yields a reasonable account of the observations up to the knee of the primary spectrum.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Astronomy & Astrophysics
Physics, Nuclear
Physics, Particles & Fields
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