Experimental results on cosmic ray composition and energy spectrum around the knee from EAS experiments

Castellina, A. (2001) Experimental results on cosmic ray composition and energy spectrum around the knee from EAS experiments. Il nuovo cimento C, 24 C (4\5). pp. 607-616. ISSN 1826-9885

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Abstract

The most recent experimental results on cosmic ray composition and energy spectrum from Extensive Air Shower arrays are reviewed and discussed. All experiments agree on the presence of the knee in the energy spectrum at an energy Ek 3 · 1015 eV; the bend is seen in all the shower components, whose study gives consistent results and do not suggest any change in hadronic interactions at these energies. An astrophysical origin for the knee is thus favoured. Most experiments agree on a primary mass composition getting heavier above the knee, but contradicting data also exist. In particular the results based on the observation of the atmospheric ˇCerenkov light, the component more strictly related to the total primary energy, seem to suggest an opposite trend.

Item Type:	Article
Additional Information:	Paper presented at the Chacaltaya Meeting on Cosmic Ray Physics, La Paz, Bolivia, July 23-27, 2000.
Uncontrolled Keywords:	Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors ; Composition, energy spectra, and interactions ; Extensive air showers ; Conference proceedings
Subjects:	500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.5 Meteorologia (Classificare qui l'atmosfera) (Classificare la previsione e le previsioni di specifici fenomeni meteorologici in 551.64; classificare la Micrometeorologia in 551.66) > 551.52 Termodinamica, interazioni atmosferiche con la superficie terrestre, temperature, radiazioni > 551.527 Radiazioni (per fenomeni ottici, vedi 551.565) > 551.5276 Radiazioni cosmiche (Include il rumore cosmico) (Classificare qui i raggi cosmici)
Depositing User:	Marina Spanti
Date Deposited:	11 Mar 2020 11:04
Last Modified:	11 Mar 2020 11:04
URI:	http://eprints.bice.rm.cnr.it/id/eprint/14452

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