Reacceleration in a Monte Carlo diffusion model for the propagation of galactic cosmic rays

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, similar toP(0.33) 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 H-2/He-4 ratio at low energies and the K-capture nuclei ratios are two possible tests that are examined.