Propagation of UHECRs in cosmological backgrounds: some results from SimProp

Understand

Ultra-High-Energy Cosmic Ray (UHECR) nuclei propagating in cosmological radiation backgrounds produce secondary particles detectable at Earth.

• SimProp is a one dimensional code for extragalactic propagation of UHECR nuclei, inspired by the kinetic approach of Aloisio et al.
• As in this approach, only a subset of nuclei and nuclear channels are used as representative.
• We discuss the validation of the code and present applications to UHECR experimental results.