The Cosmic Ray Energy Spectrum above 3 10 18 Ev Measured by the Akeno Giant Air Shower Array

Abstract

We report a rst result on the cosmic ray energy spectrum above 3 10 18 eV measured by the Akeno Giant Air Shower Array (AGASA) from July 1990 to February 1994. The analysis method and the energy resolution of the AGASA experiment are described in some detail. The attening of the spectrum around 10 19 eV (ankle) is observed with a signicance of 2.9. If we… (More)

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