Abstract
The composition of cosmic rays as they propagate from their source is noticeably distorted due to the photodisintegration of nuclei against the background cosmic radiation. We analyze the propagation of different nuclei groups of ultrahigh-energy cosmic rays on the way from their source to an earth-based facility. Two types of sources are considered: “nearby” (within an area having a radius of ≈40 Mpc) and “remote” (at distances of hundreds of Mpc) active galactic nuclei. We show that within the accepted model, the composition of the particles incident on the facility depends on the source type.
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