Estimation of the Chemical Composition in the Knee Region from the Muon/Electron Ratio in EAS

Details Estimation of the Chemical Composition in the Knee Region from the Muon/Electron Ratio in EAS Estimation of the Chemical Composition in the Knee Region from the Muon/Electron Ratio in EAS

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000nva..conf..333w&link_type=abstract

NEW VISTAS IN ASTROPHYSICS. Proceedings of the International School of Cosmic Ray Astrophysics 20th Anniversary, 11th Course. He

Astronomy and Astrophysics

Astrophysics

Scientific paper

New data on the muon/electron ratio derived from the KASCADE extensive air shower experiment are presented. This ratio is known to be the most sensitive parameter in the determination of the mass of the primary particle when using ground array data. The particle numbers are measured from the KASCADE array comprising 500 m2 of e/γ-and 620 m2 of μ- detectors. The primary mass is inferred on an event-by-event basis by comparing the experimental data to corresponding EAS simulations. We observe a change towards a heavier composition with increasing energy above the knee. The sensitivity of this result to the specific hadronic interaction model employed (e.g. VENUS and QGSJET) is discussed.

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