Primary Proton Spectrum of Cosmic Rays measured with Single Hadrons

Details Primary Proton Spectrum of Cosmic Rays measured with Single Hadrons Primary Proton Spectrum of Cosmic Rays measured with Single Hadrons

2004-06-28

arxiv.org/abs/astro-ph/0406614v1

Astrophys.J. 612 (2004) 914-920

Astronomy and Astrophysics

Astrophysics

13 pages, accepted by Astrophysical Journal

Scientific paper

10.1086/422674

The flux of cosmic-ray induced single hadrons near sea level has been measured with the large hadron calorimeter of the KASCADE experiment. The measurement corroborates former results obtained with detectors of smaller size if the enlarged veto of the 304 m^2 calorimeter surface is encounted for. The program CORSIKA/QGSJET is used to compute the cosmic-ray flux above the atmosphere. Between E_0=300 GeV and 1 PeV the primary proton spectrum can be described with a power law parametrized as dJ/dE_0=(0.15+-0.03)*E_0^{-2.78+-0.03} m^-2 s^-1 sr^-1 TeV^-1. In the TeV region the proton flux compares well with the results from recent measurements of direct experiments.

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