Physics
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..528..410w&link_type=abstract
ACCELERATION AND TRANSPORT OF ENERGETIC PARTICLES OBSERVED IN THE HELIOSPHERE: ACE 2000 Symposium. AIP Conference Proceedings, V
Physics
Cosmic Rays, Cosmic Ray Nucleosynthesis
Scientific paper
We have examined the effects of reacceleration using realistic propagation parameters for the galactic matter density, halo size, diffusion coefficient, etc., in a Monte Carlo diffusion model. Taking a diffusion coefficient, K, ~P0.33 along with reacceleration we can reproduce the observed B/C and sub Fe/Fe ratios using a rigidity dependence of dP/dt similar to that used earlier by Seo and Ptuskin. In this case the ratios at low energies can be explained without a break in K (a plus), but the observed ratios at high energies are steeper than calculated (a minus). The primary/primary ratios such as H/He, He/O, etc., are changed significantly, thus requiring different assumptions for the source abundance ratios. The amount of reacceleration needed to reproduce the observed B/C ratio is 35% of the particle's energy below 1 GeV/nuc. We have searched for more decisive examples that this level of reacceleration is actually occurring. The behavior of the 2H/4He ratio at low energies and the K-capture nuclei ratios are two possible tests that are examined. .
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