Evidence for a high-energy cosmic-ray spectrum cutoff

Details Evidence for a high-energy cosmic-ray spectrum cutoff Evidence for a high-energy cosmic-ray spectrum cutoff

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phrvl..54.1875b&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 54, April 22, 1985, p. 1875-1877. NSF-supported research.

Physics

37

Cosmic Rays, Energy Spectra, High Energy Interactions, Monte Carlo Method, Spectrum Analysis

Scientific paper

The authors report a measurement of the ultrahigh-energy cosmic-ray spectrum using an atmospheric fluorescence technique for extensive-air-shower detection. The differential spectrum between 0.1 and 10 EeV (1 EeV = 1018eV) is well fitted by a power law with slope 2.94±0.02. Above 10 EeV evidence is presented for the development of a spectral "bump" followed by a cutoff at 70 EeV.

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