Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-05-19
Astropart.Phys.24:1-25,2005
Astronomy and Astrophysics
Astrophysics
39 pages, accepted for publication in Astropart. Phys
Scientific paper
10.1016/j.astropartphys.2005.04.
A composition analysis of KASCADE air shower data is performed by means of unfolding the two-dimensional frequency spectrum of electron and muon numbers. Aim of the analysis is the determination of energy spectra for elemental groups representing the chemical composition of primary cosmic rays. Since such an analysis depends crucially on simulations of air showers the two different hadronic interaction models QGSJet and SIBYLL are used for their generation. The resulting primary energy spectra show that the knee in the all particle spectrum is due to a steepening of the spectra of light elements but, also, that neither of the two simulation sets is able to describe the measured data consistently over the whole energy range with discrepancies appearing in different energy regions.
Antoni T.
KASCADE Collaboration
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