radiation. The valence-band emission spectra are shown to be strongly dependent on the
excitation energy, up to 20–30 eV above the CK edge. It is proposed that the dependence is
indicative of the resonant inelastic scattering description of these emission spectra, ie, the
absorption-emission process should be described as a single scattering event where the
momenta of the photoelectron and the valence hole in the final state are related by …