Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...252..386w&link_type=abstract
Astrophysical Journal, Part 1, vol. 252, Jan. 1, 1982, p. 386-392.
Astronomy and Astrophysics
Astrophysics
32
Chemical Composition, Cosmic Rays, Cosmochemistry, Isotopic Enrichment, Abundance, Balloon-Borne Instruments, Carbon 12, Neon Isotopes, Nitrogen Isotopes, Nuclear Fusion, Solar Cosmic Rays, Solar System, Telescopes
Scientific paper
Using data from a cosmic ray charge-isotope telescope flown on balloons, both the charge and isotopic composition are determined of Z = 6-14 cosmic ray nuclei. A low abundance for the elements N and Ne in the cosmic ray source relative to solar cosmic rays is observed. For the isotopes, a cosmic ray source ratio Ne-22/Ne-20 is found that is 3.52 plus or minus 0.67 times the solar ratio, this enhancement being due in part to an enhancement of Ne-22 and in part to an underabundance of Ne-20. Also observed are possible enhancements of the Mg-26/Mg-24 ratio, which is 1.40 plus or minus 0.24 times the solar t ratio, and the C-13/C-12 ratio, which is 2.90 plus or minus 0.93 times the solar ratio. For Ne, the underabundance of this element, coupled with the overabundnace of the isotope Ne-22, is seen as providing an important new clue to the nucleosynthesis processes producing these differences.
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