The Cosmic-Ray Energy Spectrum between 10 14.5 and 10 16.3 eV Covering the ``Knee'' Region

Details The Cosmic-Ray Energy Spectrum between 10 14.5 and 10 16.3 eV Covering the ``Knee'' Region The Cosmic-Ray Energy Spectrum between 10 14.5 and 10 16.3 eV Covering the ``Knee'' Region

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...461..408a&link_type=abstract

Astrophysical Journal v.461, p.408

Astronomy and Astrophysics

Astronomy

63

Cosmic Rays: General

Scientific paper

The Tibet array is the first air shower detector to search for 10 TeV gamma-ray point sources. This array also has a high sensitivity to air showers initiated by cosmic rays around the "knee" of the all- particle spectrum at 1015-1016 eV, with quite small ambiguity for the energy estimation, since the development of air showers in this high energy region is close to maximum at Yangbajing altitude (4300 m above sea level).
Using the data set taken with the Tibet array in the period from 1990 October through 1993 July, we obtained the differential energy spectrum of primary cosmic rays between 3 x 1014 and 2 x 1016 eV covering the knee region. The overall spectrum obtained does not resemble a single power law and shows a gradual steepening of the slope at energies around 1015.25 eV.

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