Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-01-17
Bulletin of the Russian Academy of Sciences: Physics, 2009, Vol. 73, No. 5, pp. 564-567
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
4 pages, a paper for 30th Russian Cosmic Ray Conference (2008, St. Petersburg)
Scientific paper
The final results of processing the data from the balloon-born experiment ATIC-2 (Antarctica, 2002-2003) for the energy spectra of protons and He, C, O, Ne, Mg, Si, and Fe nuclei, the spectrum of all particles, and the mean logarithm of atomic weight of primary cosmic rays as a function of energy are presented. The final results are based on improvement of the methods used earlier, in particular, considerably increased resolution of the charge spectrum. The preliminary conclusions on the significant difference in the spectra of protons and helium nuclei (the proton spectrum is steeper) and the non-power character of the spectra of protons and heavier nuclei (flattening of carbon spectrum at energies above 10 TeV) are confirmed. A complex structure of the energy dependence of the mean logarithm of atomic weight is found.
Adams J. H. Jr.
Ahn H. S.
Bashinzhagyan G. L.
Chang Jaewan
Christl Marcus
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