Multicomponent structure in x-ray photoelectron spectroscopy of transition metal compounds

This paper is a summary of work in progress on a comprehensive study of the nature of satellite lines in x-ray photoelectron spectroscopy. The work can be broken down into three principal areas: (1) The satellite structure arising from photoionization in the K shell of transition metal compounds has been measured using CuKα x rays. From these data the relative importance of electron shake up and multiples splitting has been ascertained. (2) A systematic study of the satellite structure following photoionization in the 2p subshell of the metal ion for first row transition metal halides, hexacyano complexes, acetyl acetonates and other miscellaneous compounds. The data can be explained in terms of monopole excitation involving either charge exchange between ligand and metal orbitals or excitation of electrons in the 3d orbital. (3) A study of multiplet splitting in the 3s subshell of nickel for a series of NiFe_xCr _2-xO₄ alloys has been carried out and compared with measurements on the hyper field interactions from Mössbauer experiments.