Time-averaged abundance of galactic cosmic-ray nuclei in the atomic-number range Z equal to or greater than 50

Details Time-averaged abundance of galactic cosmic-ray nuclei in the atomic-number range Z equal to or greater than 50 Time-averaged abundance of galactic cosmic-ray nuclei in the atomic-number range Z equal to or greater than 50

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979izssr..43..862l&link_type=abstract

(Seminar po Iadernoi Kosmicheskoi Fizike, 10th, Leningrad, USSR, Oct. 1978.) Akademiia Nauk SSSR, Izvestiia, Seriia Fizicheskaia

Computer Science

Cosmic Rays, Galactic Radiation, Meteoritic Composition, Spectrum Analysis, Abundance, Crystallization, Iron, Minerals, Nuclear Structure, Particle Tracks, Phosphates, Silicates, Solar System, Time Response

Scientific paper

Results are presented for an analysis of tracks produced by galactic cosmic-ray nuclei with Z of at least 50 in silicate and phosphate minerals from three meteorites with respective radiation ages of 45, 175, and 220 million years. The charge composition and spectrum of these galactic cosmic-ray nuclei are investigated. The techniques used and difficulties encountered in interpreting the results are described in detail. Time-averaged abundances of nuclei in groups with Z of at least 50, 70, 80, 86, and 90 are determined relative to that of iron-group nuclei and compared with the solar-system abundances of the corresponding elements. A lower limit of 1.6 x 10 to the -9th is placed on the abundance of superheavy nuclei (Z of at least 110) in galactic cosmic rays relative to the iron-group nuclei.

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