The KASCADE-Grande energy spectrum of cosmic rays and the role of hadronic interaction models - INSPIRE

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The KASCADE-Grande energy spectrum of cosmic rays and the role of hadronic interaction models

W.D. Apel
(
- KIT, Karlsruhe, IKP
)
,
J.C. Arteaga-Velázquez
(
- IFM-UMSNH, Michoacan
)
,
K. Bekk
(
- KIT, Karlsruhe, IKP
)
,
M. Bertaina
(
- Turin U.
)
,
J. Blümer
(
- KIT, Karlsruhe, IKP and
- KIT, Karlsruhe, EKP
)

May 15, 2014

14 pages

Part of Proceedings, 39th COSPAR Scientific Assembly. Cosmic Ray Origins: Viktor Hess Centennial Anniversary : Mysore, India, July 14-22, 2012, 1456-1469

Published in:

Adv.Space Res. 53 (2014) 1456-1469

Contribution to:

39th COSPAR Scientific Assembly, 1456-1469

Published: May 15, 2014

DOI:

10.1016/j.asr.2013.05.008

Experiments:

KASCADE-GRANDE

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Abstract:

Previous results obtained by KASCADE-Grande using the QGSjetII-02 hadronic interaction model have shown that the energy spec- trum of cosmic rays between 10 16 eV and 10 18 eV exhibits a significant hardening at approximately 2 10 16 eV and a slight but statis- tically significant steepening close to 10 17 eV. Moreover, the analysis with QGSjetII-02 suggests that the break observed around 10 17 eV is caused by the heavy component of primary cosmic rays. In this paper, we report on the results of similar analyses performed using the SIBYLL 2.1 and EPOS 1.99 hadronic interaction models to interpret the data. The present results confirm qualitatively the previous findings. However, the intensity of the all-particle spectrum, the positions of the hardening and steepening of the spectrum, as well as the relative abundance of the heavy and light mass groups depend on the hadronic interaction model used to interpret the data.

Ultra-high energy cosmic rays
All-particle energy spectrum
Extensive air showers
Mass composition
Hadronic interaction models
KASCADE-Grande
upper limit
interaction: model
numerical calculations
Monte Carlo

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