2003/12/18 by A. A. Mikhaĭlov, Mikhailov, A. A.
Medicine · Physics and Astronomy · #Astrophysics (astro-ph) #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Radiation Therapy and Dosimetry
paper · pdf · doi:10.48550/arxiv.astro-ph/0312468
openalex publication_date 2003/12/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Arrival directions of extensive air showers by using world data are considered. It is found that the shower distribution in zenith angle at the energies E>1019 eV and E>4x1019 eV differs from each other. By our estimations, the shower with E>1020 eV at the Sugar array was not registered. The mass composition of very high-energy cosmic rays has been estimated. It is shown that E>4x1019 eV cosmic rays are, most likely, super heavy nuclei with charge Z>26.