Fine structure of all-particle energy spectrum in the knee region

All-particle energy spectrum in the knee region obtained from extensive air shower (EAS) measurements (GAMMA experiment, 700 g/cm2, Armenia) is presented. Energies of primary particles in the range of 106–108 GeV were evaluated on the basis of observed shower parameters Nch,Nμ, s, θ and correspondin...

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Bibliographic Details
Published in:Journal of physics. Conference series 2013-01, Vol.409 (1), p.12081-4
Main Authors: Garyaka, A, Martirosov, R, Ter-Antonyan, S, Babayan, H, Erlykin, A, Gallant, Y, Jones, L, Kempa, J, Nikolskaya, N, Pattison, B, Procureur, J, Sokhoyan, S, Vardanyan, H
Format: Article
Language:English
Subjects:
Computer simulation
Cosmic ray showers
Energy spectra
Fine structure
Interaction models
Iron
Knee
Knees
Nuclei
Parameterization
Particle energy
Physics
Pulsars
Reconstruction
Showers
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Summary:All-particle energy spectrum in the knee region obtained from extensive air shower (EAS) measurements (GAMMA experiment, 700 g/cm2, Armenia) is presented. Energies of primary particles in the range of 106–108 GeV were evaluated on the basis of observed shower parameters Nch,Nμ, s, θ and corresponding parameterisation of CORSIKA simulated database for SIBYLL interaction model. All shower detection and reconstruction uncertainties were included in the simulated showers for four kinds (H, He, O, Fe) of primary nuclei. The reliability of observed all-particle energy spectrum is investigated from viewpoint of methodical errors and statistical fluctuations. Observed fine structure of all-particle energy spectrum can be interpreted by the rigidity-dependent steepening Galactic diffuse nuclei flux and an additional iron component in the region of 70-80 PeV primary energies most likely originated from nearby pulsars.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/409/1/012081