The chemical composition of the cosmic radiation around the ankle and the related spectral indices
Some recent measurements of the chemical composition of the cosmic radiation indicate that at the energy of 3 x 10 **18 eV, around the ankle, light cosmic ions dominate the spectrum as it occurs in the preknee energy region. Taking advantage of a recent theory of cosmic radiation which provides a qu...
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ftdatacite:10.48550/arxiv.0911.4633 2023-05-15T18:45:30+02:00 The chemical composition of the cosmic radiation around the ankle and the related spectral indices Codino, Antonio Plouin, Francois 2009 https://dx.doi.org/10.48550/arxiv.0911.4633 https://arxiv.org/abs/0911.4633 unknown arXiv arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ High Energy Astrophysical Phenomena astro-ph.HE Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences Preprint Article article CreativeWork 2009 ftdatacite https://doi.org/10.48550/arxiv.0911.4633 2022-04-01T15:06:39Z Some recent measurements of the chemical composition of the cosmic radiation indicate that at the energy of 3 x 10 **18 eV, around the ankle, light cosmic ions dominate the spectrum as it occurs in the preknee energy region. Taking advantage of a recent theory of cosmic radiation which provides a quantitative explanation of the knee, the second knee and the ankle, the chemical composition of cosmic radiation is explicitly calculated giving individual ion spectra and ion fractions from 10 ** 12 eV to 5 x 10 ** 19 eV. The calculation assumes two components of the cosmic radiation feeding the ion flux at Earth: one originated in the disc volume and another one, called extradisc component, which from the disc boundaries traverses the Galaxy reaching the solar system. Data above 10 ** 17 eV collected during half century of experimentation by Auger, HiRes, Agasa, Akeno, Fly' s Eye, Yakutsk, Haverah Park and Volcano Ranch experiments are reviewed, examined and compared with the theoretical . The comparison between computed and measured exhibits a good global accord up to 2 x 10 ** 19 eV except with the HiRes experiment and an excellent agreement in the range 10 ** 15 - 10 ** 17 eV with Kascade, Eas-top, Tunka and other experiments. The accord requires a flux of the extradisc component of 1.8 x 10 ** 14 particles / m ** 2 sr s eV **(1.5) at 10 ** 19 eV, twice that generated by disc sources. : 27 pages, 36 figures Report Yakutsk DataCite Metadata Store (German National Library of Science and Technology) Yakutsk |
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High Energy Astrophysical Phenomena astro-ph.HE Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
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High Energy Astrophysical Phenomena astro-ph.HE Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences Codino, Antonio Plouin, Francois The chemical composition of the cosmic radiation around the ankle and the related spectral indices |
topic_facet |
High Energy Astrophysical Phenomena astro-ph.HE Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
description |
Some recent measurements of the chemical composition of the cosmic radiation indicate that at the energy of 3 x 10 **18 eV, around the ankle, light cosmic ions dominate the spectrum as it occurs in the preknee energy region. Taking advantage of a recent theory of cosmic radiation which provides a quantitative explanation of the knee, the second knee and the ankle, the chemical composition of cosmic radiation is explicitly calculated giving individual ion spectra and ion fractions from 10 ** 12 eV to 5 x 10 ** 19 eV. The calculation assumes two components of the cosmic radiation feeding the ion flux at Earth: one originated in the disc volume and another one, called extradisc component, which from the disc boundaries traverses the Galaxy reaching the solar system. Data above 10 ** 17 eV collected during half century of experimentation by Auger, HiRes, Agasa, Akeno, Fly' s Eye, Yakutsk, Haverah Park and Volcano Ranch experiments are reviewed, examined and compared with the theoretical . The comparison between computed and measured exhibits a good global accord up to 2 x 10 ** 19 eV except with the HiRes experiment and an excellent agreement in the range 10 ** 15 - 10 ** 17 eV with Kascade, Eas-top, Tunka and other experiments. The accord requires a flux of the extradisc component of 1.8 x 10 ** 14 particles / m ** 2 sr s eV **(1.5) at 10 ** 19 eV, twice that generated by disc sources. : 27 pages, 36 figures |
format |
Report |
author |
Codino, Antonio Plouin, Francois |
author_facet |
Codino, Antonio Plouin, Francois |
author_sort |
Codino, Antonio |
title |
The chemical composition of the cosmic radiation around the ankle and the related spectral indices |
title_short |
The chemical composition of the cosmic radiation around the ankle and the related spectral indices |
title_full |
The chemical composition of the cosmic radiation around the ankle and the related spectral indices |
title_fullStr |
The chemical composition of the cosmic radiation around the ankle and the related spectral indices |
title_full_unstemmed |
The chemical composition of the cosmic radiation around the ankle and the related spectral indices |
title_sort |
chemical composition of the cosmic radiation around the ankle and the related spectral indices |
publisher |
arXiv |
publishDate |
2009 |
url |
https://dx.doi.org/10.48550/arxiv.0911.4633 https://arxiv.org/abs/0911.4633 |
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Yakutsk |
geographic_facet |
Yakutsk |
genre |
Yakutsk |
genre_facet |
Yakutsk |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.0911.4633 |
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1766236558169473024 |