Raising of Discrete Levels into the Far Continuum

Metal-induced gap states in epitaxial organic-insulator/metal interfaces

“…The final state interaction between electrons and electron-vacancies can distort or produce additional peak in NEXAFS. 13 However, these effects would be tiny when the interatomic interaction is weak. 14 So the assignment of the prepeak to the MIGS should be reasonable.…”

Perturbation theory in a strong-interaction regime with application to 4d-subshell spectra of Ba and La

“…In such a case Wendin (1976b) has shown that the nodal structure of the zero-order basis set may be altered, thus requiring a change in the naming of the improved wavefunctions and energy levels. Neglect of this required renaming has led to a recent controversy over the merits of alternative calculational procedures which should, in principle, be equivalent (Dehmer et al 1971. A main purpose of the present paper is to demonstrate this equivalence numerically, using the formulae presented here, for those elements that have been involved in the controversy: barium and lanthanum.…”

“…The controversy relates to the theoretical interpretation by Dehmer et al (Dehmer et al 1971, Starace 1972, 1974, Sugar 1972, Dehmer and Starace 1972 of the 4d-subshell photoabsorption spectra of the rare earths (57 ≤ Z ≤ 70). In brief, Dehmer et al (1971) interpreted these experimental spectra , Haensel et al 1970, Gudat and Kunz 1972 as resulting from a simple two-step process: photoexcitation of a 4d-subshell electron into the 4f subshell, i.e.…”

“…In brief, Dehmer et al (1971) interpreted these experimental spectra , Haensel et al 1970, Gudat and Kunz 1972 as resulting from a simple two-step process: photoexcitation of a 4d-subshell electron into the 4f subshell, i.e. where N is the occupation number of the 4f subshell, followed by autoionization of the various terms of the 4d 9 4f N + 1 configuration into the alternative continuum channels 4d 9 4f N + e -, i.e.…”

Core and shallow-cored- tof-shell excitations in rare-earth metals

“…By contrast, the higher energy spectral structure (>115 eV) is influenced by more extended final states that interact with the continuum bands, giving rise to Fano resonances and clearly leaving the ionic limit [29,[49][50][51][52].…”