The (C-13)/(C-12) ratio in cosmic ray sources

Details The (C-13)/(C-12) ratio in cosmic ray sources The (C-13)/(C-12) ratio in cosmic ray sources

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...215..128w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 215, no. 1, May 1989, p. 128-130.

Astronomy and Astrophysics

Astrophysics

10

Carbon Isotopes, Cosmic Rays, Interstellar Matter, Radiation Sources, Abundance, Chemical Composition, Solar System, Wolf-Rayet Stars

Scientific paper

Published measurement data on the production C-13 during interstellar propagation of cosmic rays (Webber et al., 1987; Guzik et al., 1985) are combined with observational data to determine the relative abundance of C-13 in the cosmic-ray source. The theoretical basis and implementation of the calculations are described in detail, and the results are presented in graphs. (C-13)/(C-12) is estimated as 0.003 + or - 0.005, consistent with the solar ratio (0.011), not consistent with the local abundance ratio (0.023), and in agreement with the source ratio predicted by Prantzos et al. (1985) using the isotopic abundances of WR-star ejecta.

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