Author/Authors :
Antoni، نويسنده , , T. and Apel، نويسنده , , W.D. and Badea، نويسنده , , A.F. and Bekk، نويسنده , , K. and Bercuci، نويسنده , , A. and Blümer، نويسنده , , J. and Bozdog، نويسنده , , H. and Brancus، نويسنده , , I.M. and Chilingarian، نويسنده , , A. and Daumiller، نويسنده , , K. and Doll، نويسنده , , P. and Engel، نويسنده , , R. and Engler، نويسنده , , J. and Feكler، نويسنده , , F. and Gils، نويسنده , , H.J. and Glasstetter، نويسنده , , R. and H، نويسنده ,
Abstract :
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.
