Statistics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aipc..264..379s&link_type=abstract
In: Particle acceleration in cosmic plasmas; Proceedings of the Workshop, Bartol Research Inst., Newark, DE, Dec. 4-6, 1991 (A93
Statistics
3
Cosmic Rays, Energy Spectra, High Energy Interactions, Particle Acceleration, Cosmic Ray Showers, Cosmochemistry
Scientific paper
Attention is given to the composition of cosmic rays at very high energies, where data on the chemical and isotropic compositions of cosmic rays are restricted by the decreasing statistics and the ambiguity in the interpretation of detected events. It is shown that the investigation of the composition in a wide energy range should reveal important clues on the acceleration mechanisms in general, and even a limited data set could meaningfully restrict the wide variety of acceleration models that are considered today. Results show how the fraction of protons in the cosmic ray flux declines, while being more than compensated by an increasing fraction of heavy nuclei. The helium component seems not to change much in the energy range from 10 exp 12 to 10 exp 14 eV.
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