Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..44...35o&link_type=abstract
Astrophysics and Space Science, vol. 44, Sept. 1976, p. 35-45. Research supported by the Research Corp.
Astronomy and Astrophysics
Astrophysics
3
Astronomical Models, Cosmic Rays, Galactic Radiation, Nuclear Interactions, Particle Diffusion, Radiative Lifetime, Cosmology, High Energy Interactions, Radioactive Age Determination, Steady State
Scientific paper
The distribution of ages for secondary and interacting cosmic-ray nuclei is derived for a class of steady-state bounded models of diffusion in the Galaxy. Results are presented in detail for the model in which diffusion is in one dimension, sources are uniformly distributed throughout the scattering region, and particles are observed near the central plane of the Galaxy. The leakage-lifetime approximation is shown to be accurate as long as the ratio of the cosmic-ray diffusive lifetime to the mean interaction or decay lifetime is less than about ten.
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