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The energies of photoemitted electrons are calculated for alkali halide and alkaline-earth chalcogenide crystals. The ionization energy of the closed-shell ions are calculated in the crystalline environment, which is simulated as a spherical average of pseudopotentials. Apparent binding energies in photoemission are obtained by adding these ionization energies to the hole self-energies from electronic relaxation.
G. D. Mahan (Mon,) studied this question.