Multiplet Structure in X-Ray <i>p</i>-Shell Photoelectron and K-Emission Spectra of Nickel Compounds

Abstract

Energies of the terms arising from electron configuration n ' p 5 n d 8 in a cubic field and being reached by the transitions of X-ray p -photoelectron emission and K -emission in nickel compounds are calculated on the basis of the ligand field theory in the strong field scheme. The spin-orbit interaction is taken into account for p -electrons but not for d -electrons. Intensities of these transitions are also calculated. It is shown that fairly good agreements with the experimental 3 p -photoelectron and K α- and K β-emission spectra of some nickel compounds are obtained if one assumes the cubic field strength of about 2 eV and approximately 50% reduction of the p - d interaction of a free Ni 2+ ion.