Proc. IAU volume 13, issue S332, P370-373 2017 DOI: 10.1017/s1743921317007633 View full text
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Eric R. Willis, Robin T. Garrod

Abstract: AbstractBack-diffusion is the phenomenon by which random walkers revisit binding sites on a lattice. This phenomenon must occur on interstellar dust particles, slowing down dust-grain reactions, but it is not accounted for by standard rate-equation models. Microscopic kinetic Monte Carlo models have been used to investigate the effect of back-diffusion on reaction rates on interstellar dust grains. Grain morphology, size, and grain-surface coverage were varied and the effects of these variations on the magnitu…

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