Abstract
We provide a parameter-free perturbation theory calculation of the probability of charge capture via the direct Auger process to-slow ions scattering from simple metals. The results are sensitively dependent on the surface electron density profile and atomic wavefunction distortion in the near surface region. The time development of the atomic state occupation is examined in the limit of Auger coupling alone. The resonant and Auger transition rates to the 1s state of hydrogen scattered from aluminium, calculated using comparable models, are found to be essentially identical for ion-surface separations exceeding 2 a 0.
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