Comment on "On the Origin of the Highest Energy Cosmic Rays"
Luis N. Epele, Esteban Roulet
Abstract
We show that the photodisintegration of heavy cosmic ray nuclei with energies above 1020 eV is dominated by interactions with photons from the cosmic microwave background radiation, rather than from infrared ones. This implies that the observed air shower events with energies 2-3 1020 eV cannot originate from Fe nuclei coming from distances beyond 10 Mpc
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