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Incomplete Relaxation in a model problem for the Auger process

Almbladh, Carl-Olof LU (1974) In Il Nuovo Cimento B 23(1). p.76-89
Abstract
Excitation of a core electron and the subsequent emission of an Auger electron is described in a simplified model, where the core electrons couple only to the plasma oscillations of the conduction electrons and not to individual electron-hole excitations. Results are evaluated to lowest nontrivial order, namely when only terms linear in the interaction with the exciting probe and linear in the Auger coupling are kept. This leads to a four-particle Green’s function which can be evaluated exactly within the present simple model. It is shown explicitly that for long core-hole lifetimes the Auger spectrum is the same as in the two-step approximation (complete relaxation). The possibilities of high-energy satellites in the case of short... (More)
Excitation of a core electron and the subsequent emission of an Auger electron is described in a simplified model, where the core electrons couple only to the plasma oscillations of the conduction electrons and not to individual electron-hole excitations. Results are evaluated to lowest nontrivial order, namely when only terms linear in the interaction with the exciting probe and linear in the Auger coupling are kept. This leads to a four-particle Green’s function which can be evaluated exactly within the present simple model. It is shown explicitly that for long core-hole lifetimes the Auger spectrum is the same as in the two-step approximation (complete relaxation). The possibilities of high-energy satellites in the case of short core-hole lifetimes are discussed. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Auger spectra, many-body theory, Core eletron spectroscopy
in
Il Nuovo Cimento B
volume
23
issue
1
pages
76 - 89
external identifiers
  • Scopus:51649189379
language
English
LU publication?
yes
id
3368feb2-3630-4f4b-a8c1-309dc77efe54 (old id 8772445)
date added to LUP
2016-02-27 01:21:53
date last changed
2016-04-16 12:25:26
@misc{3368feb2-3630-4f4b-a8c1-309dc77efe54,
  abstract     = {Excitation of a core electron and the subsequent emission of an Auger electron is described in a simplified model, where the core electrons couple only to the plasma oscillations of the conduction electrons and not to individual electron-hole excitations. Results are evaluated to lowest nontrivial order, namely when only terms linear in the interaction with the exciting probe and linear in the Auger coupling are kept. This leads to a four-particle Green’s function which can be evaluated exactly within the present simple model. It is shown explicitly that for long core-hole lifetimes the Auger spectrum is the same as in the two-step approximation (complete relaxation). The possibilities of high-energy satellites in the case of short core-hole lifetimes are discussed.},
  author       = {Almbladh, Carl-Olof},
  keyword      = {Auger spectra,many-body theory,Core eletron spectroscopy},
  language     = {eng},
  number       = {1},
  pages        = {76--89},
  series       = {Il Nuovo Cimento B},
  title        = {Incomplete Relaxation in a model problem for the Auger process},
  volume       = {23},
  year         = {1974},
}