The sweeping rate in diffusion-mediated reactions on dust grain surfaces

@inproceedings{Lohmar2003TheSR,
  title={The sweeping rate in diffusion-mediated reactions on dust grain surfaces},
  author={Ingo Lohmar and Joachim Krug},
  year={2003}
}
A prominent chemical reaction in interstellar clouds is the formation of molecular hydrogen by recombination, which essentially takes place on dust grain surfaces. Analytical approaches to model such a system have hitherto neglected the spatial aspects of the problem by employing a simplistic version of the sweeping rate of reactants. We show how these aspects can be accounted for by a consistent definition of the sweeping rate, and calculate it exactly for a spherical grain. Two regimes can be… CONTINUE READING

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