Abstract
A model potential to describe the interaction of a diatomic molecule with a solid surface has previously been derived and applied to the case of H2 interacting with a tungsten (001) surface. Using this potential we have computed a series of classical trajectories designed to simulate the collision of a gas-phase hydrogen atom with an adsorbed hydrogen atom. Comparisons are made with the results of recombination studies of two adsorbed atoms and with the collision of an atom with a bare surface.
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