2017/03/01 by А. Д. Панов, A. D. Panov, N. V. Sokolskaya +2
Physics and Astronomy · #Astronomy #Astrophysics and Cosmic Phenomena #Atomic physics #Cosmic ray #Dark Matter and Cosmic Phenomena #Helium #Ion #Ionization #Materials science #Muon #Nuclear physics #Particle Detector Development and Performance #Physics #Range (aeronautics) #Rigidity (electromagnetism) #Spectral line #astro-ph.HE
paper · pdf · doi:10.3847/1538-4357/aa6041
published as The Astrophysical Journal, 837:77 (7pp), 2017 · 8 pages, 11 figures
openalex publication_date 2017/03/01 · openalex created_date 2017/03/16 · arxiv created 2017/03/23 · arxiv updated 2017/08/01 · openalex updated_date 2026/08/05
Abstract One of the main results of the ATIC (Advanced Thin Ionization Calorimeter) experiment is a collection of energy spectra of abundant cosmic-ray nuclei: protons, He, C, O, Ne, Mg, Si, and Fe measured in terms of energy per particle in the energy range from 50 GeV to tens of teraelectronvolts. In this paper, the ATIC energy spectra of abundant primary nuclei are back-propagated to the spectra in sources in terms of magnetic rigidity using a leaky-box approximation of three different GALPROP-based diffusion models of propagation that fit the latest B/C data of the AMS-02 experiment. It is shown that the results of a comparison of the slopes of the spectra in sources are weakly model dependent; therefore the differences of spectral indices are reliable data. A regular growth of the steepness of spectra in sources in the range of magnetic rigidity of 50–1350 GV is found for a charge range from helium to iron. This conclusion is statistically reliable with significance better than 3.2 standard deviations. The results are discussed and compared to the data of other modern experiments.