A study of the primary cosmic ray composition in the energy range 5.10(14)-5.10(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.

Study of the Primary Cosmic-ray Composition Around the Knee of the Energy-spectrum / M., A., B., A., P., A., F., A., L., B., M., B., A. C., F., C., C., A., C., C., C., A., C., G., C., D'ETTORRE PIAZZOLI, B., G., D., W., F., P., G., P. L., G., Iacovacci, M., G., M., C., M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 337:(1994), pp. 376-382. [10.1016/0370-2693(94)90991-1]

Study of the Primary Cosmic-ray Composition Around the Knee of the Energy-spectrum

D'ETTORRE PIAZZOLI, BENEDETTO;IACOVACCI, MICHELE;BARBARINO, GIANCARLO;GUARINO, FAUSTO;
1994

Abstract

A study of the primary cosmic ray composition in the energy range 5.10(14)-5.10(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.
1994
Study of the Primary Cosmic-ray Composition Around the Knee of the Energy-spectrum / M., A., B., A., P., A., F., A., L., B., M., B., A. C., F., C., C., A., C., C., C., A., C., G., C., D'ETTORRE PIAZZOLI, B., G., D., W., F., P., G., P. L., G., Iacovacci, M., G., M., C., M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 337:(1994), pp. 376-382. [10.1016/0370-2693(94)90991-1]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/468713
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