Collective effects, relaxation, and localization of hole levels in atoms, molecules, solids, and adsorbates

Abstract

Recent progress in descriptions of photoelectron spectra is reviewed with emphasis on cases where the one-electron and quasiparticle approximations break down and the hole level becomes spread over a number of discrete lines or a continuum or both. Unifying aspects and similarities between interaction processes in atoms, molecules, and solids are stressed.

Photoelectron angular distribution studies of the outer valence states of N2

“…These features start directly at the bottom of the rising edge of the dip at 22 eV and fades out to 26 eV. We propose that this structure could occur due to the widely discussed Rydberg-enhanced autoionization states converging to C 2 + u (Codling 1966, Gürtler et al 1977, Berg et al 1991 superimposed on the feature due to valence-like doubly excited states (Wendin 1979). As depicted in figure 2 the photon energy positions of the observed resonance structures are in remarkable agreement with the total ion yield findings of Berg et al (1991) strongly supporting this interpretation.…”

“…The theoretical curves are taken from Decleva (2010) and Tashiro (2010). In the experimental data one can clearly see a dip in the energy region from 20 to 23 eV which is thought to be originated by Rydberg-enhanced coupling to the C 2 + u state (Codling 1966) or by doubly excited valence-like states (Wendin 1979). Following the arguments of Southworth et al (1986a), the interpretation of Wendin (1979) is supported due to the short lifetimes of doubly excited valence-like states explaining the broad width of the discussed dip in the photon energy dependence of β.…”