Abstract
Classical trajectory calculations of NO scattering on Ag(111) have been performed using a model potential energy surface to describe the molecule-substrate interaction. It is shown that appreciable vibrational excitation can be obtained using potential energy surfaces which correctly describe other known properties of the NOAg(111) interaction. The question whether the experiments allow the discrimination between direct excitation, as proposed in our model, and excitation by thermal electron-hole pairs from the substrate conduction band, is discussed.
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