Multiplet Structures in 3d and 4d Core Photoemission Spectra for Ce Compounds

Abstract

The Ce 3d and 4d core X-ray photoemission spectra (3d and 4d XPS) of Ce compounds are studied based on the impurity Anderson model considering atomic multiplets arising from electron-electron interaction. We make a consistent analysis of 3d and 4d XPS of trivalent Ce compounds CeF₃, CeCl₃ and Ce₂O₃, which can only be made by considering the atomic multiplets. We also apply the approach to the interpretation of the spectra of mixed valent Ce systems Ce–Ni compounds and CeO₂. We show that the analysis of the multiplet structure gives information about many-body electronic states of the system.