Extension of the Cosmic-Ray Energy Spectrum beyond the Predicted Greisen-Zatsepin-Kuz'min Cutoff

Takeda, M.; Hayashida, N.; Honda, K.; Inoue, N.; Kadota, K.; Kakimoto, F.; Kamata, K.; Kawaguchi, S.; Kawasaki, Y.; Kawasumi, N.; Kitamura, Hisashi; Kusano, Eiji; Matsubara, Y.; Murakami, Kazuaki; Nagano, M.; Nishikawa, D.; Ohoka, H.; Сакаки, Н.; Sasaki, M.; Shinozaki, K.; Souma, N.; Teshima, M.; Torii, R.; Tsushima, I.; Uchihori, Y.; Yamamoto, T.; Yoshida, S.; Yoshii, H.

doi:10.1103/physrevlett.81.1163

Public

Extension of the Cosmic-Ray Energy Spectrum beyond the Predicted Greisen-Zatsepin-Kuz'min Cutoff

Published in Physical Review Letters • Aug 10, 1998

Authors:

M. Takeda

N. Hayashida

K. Honda

Abstract

The cosmic-ray energy spectrum above ${10}^{18.5}\mathrm{eV}$ is reported using the updated data set of the Akeno Giant Air Shower Array from February 1990 to October 1997. The energy spectrum extends beyond ${10}^{20}\mathrm{eV}$ and the energy gap between the highest energy event and the others is...

Subject

Cutoff

Physics

Cosmic ray

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