The cosmic ray energy spectrum between 10^14 and 10^16 eV

Details The cosmic ray energy spectrum between 10^14 and 10^16 eV The cosmic ray energy spectrum between 10^14 and 10^16 eV

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aph....10..291g&link_type=abstract

Astroparticle Physics, Volume 10, Issue 4, p. 291-302.

Physics

63

Scientific paper

The energy spectrum of cosmic rays with primary energies between 10^14 eV and 10^16 eV has been studied with the CASA-MIA air shower array. The measured differential energy spectrum is a power law (dj/dE ~E^-gamma) with spectral indices gamma of 2.66+/-0.02 below approximately 10^15 eV and 3.00+/-0.05 above. A new method is used for measuring primary energy derived from ground-based data in a compositionally insensitive way. In contrast with some previous reports, the ``knee'' of the energy spectrum does not appear sharp, but rather a smooth transition over energies from 10^15 eV to 3.0 x10^15 eV.

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