Deficit of Ultrahigh Energy Extensive Air Showers
A. A. Mikhailov, N. N. Efremov, I. T. Makarov, G. V. Nikolayeva, G. G. Struchkov
Abstract
Arrival directions of extensive air showers by using world data are considered. It is shown that distributions of showers in zenith angle at E>1019eV and E>4.1019eV differ from each other. On this basis the conclusions are made: the estimation of the energy of inclined showers at E>4.1019eV at Yakutsk and AGASA arrays is incorrect; the cosmic ray spectrum is not break up and most likely continued up to E=1020eV and higher. It is found that ultrahigh energy cosmic rays are, probably, superheavy nuclei.
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