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27 April 2024 |
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Ankle-like Feature in the Energy Spectrum of Light Elements of Cosmic Rays Observed with KASCADE-Grande | | W.D. Apel
; J.C. Arteaga-Velàzquez
; K. Bekk
; M. Bertaina
; J. Blümer
; H. Bozdog
; I.M. Brancus
; E. Cantoni
; A. Chiavassa
; F. Cossavella
; K. Daumiller
; V. de Souza
; F. Di Pierro
; P. Doll
; R. Engel
; J. Engler
; M. Finger
; B. Fuchs
; D. Fuhrmann
; H.J. Gils
; R. Glasstetter
; C. Grupen
; A. Haungs
; D. Heck
; J.R. Hörandel
; D. Huber
; T. Huege
; K.-H. Kampert
; D. Kang
; H.O. Klages
; K. Link
; P. Łuczak
; M. Ludwig
; H.J. Mathes
; H.J. Mayer
; M. Melissas
; J. Milke
; B. Mitrica
; C. Morello
; J. Oehlschläger
; S. Ostapchenko
; N. Palmieri
; M. Petcu
; T. Pierog
; H. Rebel
; M. Roth
; H. Schieler
; S. Schoo
; F.G. Schröder
; O. Sima
; G. Toma
; G.C. Trinchero
; H. Ulrich
; A. Weindl
; J. Wochele
; M. Wommer
; J. Zabierowski
; | | Date: |
26 Apr 2013 | | Abstract: | Recent results of the KASCADE-Grande experiment provided evidence for a mild
knee-like structure in the all-particle spectrum of cosmic rays at $E =
10^{16.92 pm 0.10} , mathrm{eV}$, which was found to be due to a steepening
in the flux of heavy primary particles. The spectrum of the combined components
of light and intermediate masses was found to be compatible with a single power
law in the energy range from $10^{16.3} , mathrm{eV}$ to $10^{18} ,
mathrm{eV}$. In this paper, we present an update of this analysis by using
data with increased statistics, originating both from a larger data set
including more recent measurements and by using a larger fiducial area. In
addition, optimized selection criteria for enhancing light primaries are
applied. We find a spectral feature for light elements, namely a hardening at
$E = 10^{17.08 pm 0.08} , mathrm{eV}$ with a change of the power law index
from $-3.25 pm 0.05$ to $-2.79 pm 0.08$. | | Source: | arXiv, 1304.7114 | | Services: | Forum | Review | PDF | Favorites | |
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