Particle–hole interaction effect on a core-level XPS spectrum II

✍ Scribed by Masahide Ohno

• Book ID: 104332738
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 281 KB
• Volume: 107
• Category: Article
• ISSN: 0368-2048
• DOI: 10.1016/s0368-2048(00)00092-x

✦ Synopsis

The 4s-and 4p-level X-ray photoelectron spectroscopy (XPS) spectra of the elements Pd to Ba are studied by a many-body model calculation. The separation energy and coupling strength between the unperturbed initial core-hole state and the final two-hole one-particle state, and the particle-hole interaction U in the final two-hole one-particle state are used as the parameter values. The anomalous 4p hole spectral profile changes with the atomic number are well reproduced by the present many-body theory. The changes are explained in terms of U and the separation energy. In a strong coupling regime (I to Ba) there is a bound state which results from the interaction between the initial core-hole state and the final two-hole one-particle continuum and / or bound state. In a weak coupling regime (Pd to Te) the quasi-particle approximation for the initial core-hole state breaks down.