An atomic screening model for solid-state effects in electron emission spectra

A formalism based upon an atomic Hartree-Fock screening model is developed to predict the 'solid-state' or 'extra-atomic relaxation' energy contribution to orbital electron binding energies, X-ray transition energies and Auger-electron transition energies for elemental systems transformed from the vapour phase to the condensed phase. The model, incorporating an equivalent-cores approximation, has been shown to be chosen as the least tightly bound orbital. More experimental data are required to evaluate the usefulness of the model for systems where this condition is not satisfied.