Abstract

Abstract Classical dynamical calculations of the momentum dissipation of 600–20 000 eV Ar + in clean metal single crystals indicate that the experimentally observed cluster species form by a recombination mechanism in the near surface region. The dependence of cluster yields on primary ion energy has been computed and matches well the shape of the experimental curve for Ni 3 + /Ni 2 + . The results suggest that a simple power law based on the yield of monomers is not sufficient to predict accurate cluster yields.

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