Primary Proton Spectrum of Cosmic Rays measured with Single Hadrons
T. Antoni, KASCADE Collaboration
Abstract
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 m2 calorimeter surface is encounted for. The program CORSIKA/QGSJET is used to compute the cosmic-ray flux above the atmosphere. Between E0=300 GeV and 1 PeV the primary proton spectrum can be described with a power law parametrized as dJ/dE0=(0.15+-0.03)*E0-2.78+-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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