Possibility of solar energetic particles enrichment with trans-iron ions via the effect of coulomb losses in the acceleration region |
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| Authors: | Yu Yu Kartavykh W Dröge B Klecker G A Kovaltsov L Kocharov E Möbius |
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| Institution: | 1.Ioffe Physicotechnical Institute,Russian Academy of Science,St. Petersburg,Russia;2.Institute for Theoretical Physics and Astrophysics,University of Würzburg,Würzburg,Germany;3.Max Planck Institute for Extraterrestrial Physics,Garching,Germany;4.University of Turku,Turku,Finland;5.Space Science Center and Department of Physics,University of New Hampshire,Durham,USA |
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| Abstract: | We discuss the possibility of the enrichment of solar energetic particles (SEP) with trans-iron ions in impulsive events.
Aiming to estimate the acceleration of ions in the weight range of 84–210 atomic units, we calculated the energy dependences
of the ionization and recombination rates of energetic ions of Kr, Te, and Pb. On the basis of the charge-consistent model
of the stochastic acceleration of ions in Alfven turbulence (including the spatial diffusion of ions and Coulomb losses of
energy), we calculated energy spectra of O, Fe, Kr, Re, and Pb at various values of the spectral index of turbulence for a
wide range of parameters of plasma in the acceleration region. It was demonstrated that the Coulomb losses could be one reason
for the observed significant SEP enrichment with trans-iron ions in impulsive events. |
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