Abstract
Recent theory of the resonant electron transfer in atom scattering from a metal surface is reviewed with emphasis of the limiting formulae which give simple physical interpretations. The atom is assumed to follow a given classical trajectory. The electronic system is treated quantum-mechanically within the wide band approximation for the metal conduction band, since the motion of the atom is assumed to be slow. For the charge exchange problem, the electron correlation is incorporated into the theory within the Hartree-Fock approximation. Only low-lying electron-hole pair excitations are accounted for as the energy dissipation channel.
