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On the Theory of Plasmon Satellite Structures in the Photoelectron Spectra of Non‐Metallic Solids I. Soluble Model
Author(s) -
Becrstedt F.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221010129
Subject(s) - plasmon , photoionization , x ray photoelectron spectroscopy , atomic physics , electron , spectral line , kinetic energy , excited state , valence electron , molecular physics , chemistry , physics , ionization , nuclear magnetic resonance , optics , ion , quantum mechanics , organic chemistry
Intrinsic and extrinsic plasmon effects on the photoelectron spectra of non‐metals are studied simultaneously. The spectral behaviour of the photoionization cross‐section is represented by a convolution integral of the spectral functions of the outgoing electron and the excited core hole. Considering the relaxation of the valence electron gas the spectral functions are calculated in the frame of a linear dielectric formalism. It is shown, that the relaxation of the valence electrons in the presence of the electron depends strongly on the kinetic energy. For large kinetic energies (XPS) the electron effects are small and the photoelectron spectrum is nearly represented by the hole spectral function. For small kinetic energies (UPS) neither the hole mechanism nor the electron one dominates and the plasmon satellites are due to both, intrinsic and extrinsic effects.