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Nonthermal element abundances at astrophysical shocks

Eichmann, Björn; Rachen, Jörg P.

The nonthermal source abundances of elements play a crucial role in the understanding of cosmic ray phenomena from a few GeV up to several tens of EeV . We present a first systematic approach to describe the change of the abundances from the thermal to the nonthermal state via diffusive shock acceleration by a temporally evolving shock. We conside…