Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233..374w&link_type=abstract
Astrophysical Journal, Part 1, vol. 233, Oct. 1, 1979, p. 374-382.
Astronomy and Astrophysics
Astrophysics
4
Abundance, Cosmic Rays, Galactic Radiation, Interstellar Matter, Isotopes, Light Elements, Energetic Particles, Gas Density, Kinetic Energy, Particle Flux Density, Proton Energy, Spallation
Scientific paper
The fluxes of the light isotopes in the galactic cosmic rays are calculated in the energy range from 10 MeV to 5 GeV. The mean amount of matter traversed is taken to increase with decreasing energy, and various forms of the source spectrum are assumed. It is shown that it is possible to reconcile all observed abundance ratios including the low Be-10 abundance found by Garcia-Munoz et al. (1977) with an interstellar gas density of 1 atom/cu cm. However, a low value for the adiabatic deceleration in the solar cavity must be assumed. Comparing isotopes of the light elements does not give a unique solution for the deceleration, and it seems to be more profitable to use the isotopes of H and He for this purpose.
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