Advanced

Dynamical calculations of X-ray absorption and emission spectra

von Barth, Ulf LU and Grossmann, Günter LU (1980) In Physica Scripta 21(3-4).
Abstract
The authors have previously shown that one-particle calculations of X-ray spectra in simple metals give very different results depending on whether the core hole is taken into account or not. Guided by experiment and the dynamical theory of X-ray spectra developed by Nozieres and DeDominicis (ND) (1969) the authors have, however, also established the rule that rather realistic spectra can be obtained from a one-particle calculation provided final state wavefunctions are used in the transition matrix elements. They report on direct numerical evaluations of the dynamical ND theory for several different cases including the case where a bound state appears. In all cases the results support their final state rule. They also give arguments in... (More)
The authors have previously shown that one-particle calculations of X-ray spectra in simple metals give very different results depending on whether the core hole is taken into account or not. Guided by experiment and the dynamical theory of X-ray spectra developed by Nozieres and DeDominicis (ND) (1969) the authors have, however, also established the rule that rather realistic spectra can be obtained from a one-particle calculation provided final state wavefunctions are used in the transition matrix elements. They report on direct numerical evaluations of the dynamical ND theory for several different cases including the case where a bound state appears. In all cases the results support their final state rule. They also give arguments in support of the procedure used to extract threshold exponents and asymmetry indices from X-ray absorption and emission spectra and X-ray photoemission spectra.(18 refs) (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physica Scripta
volume
21
issue
3-4
publisher
Institute of Physics Publishing Ltd.
external identifiers
  • scopus:17144399709
ISSN
0031-8949
DOI
10.1088/0031-8949/21/3-4/056
language
English
LU publication?
yes
id
ece55632-0032-49cd-b108-8afeba812143 (old id 8832005)
date added to LUP
2016-03-04 09:43:04
date last changed
2017-01-01 07:39:52
@article{ece55632-0032-49cd-b108-8afeba812143,
  abstract     = {The authors have previously shown that one-particle calculations of X-ray spectra in simple metals give very different results depending on whether the core hole is taken into account or not. Guided by experiment and the dynamical theory of X-ray spectra developed by Nozieres and DeDominicis (ND) (1969) the authors have, however, also established the rule that rather realistic spectra can be obtained from a one-particle calculation provided final state wavefunctions are used in the transition matrix elements. They report on direct numerical evaluations of the dynamical ND theory for several different cases including the case where a bound state appears. In all cases the results support their final state rule. They also give arguments in support of the procedure used to extract threshold exponents and asymmetry indices from X-ray absorption and emission spectra and X-ray photoemission spectra.(18 refs)},
  articleno    = {580},
  author       = {von Barth, Ulf and Grossmann, Günter},
  issn         = {0031-8949},
  language     = {eng},
  number       = {3-4},
  publisher    = {Institute of Physics Publishing Ltd.},
  series       = {Physica Scripta},
  title        = {Dynamical calculations of X-ray absorption and emission spectra},
  url          = {http://dx.doi.org/10.1088/0031-8949/21/3-4/056},
  volume       = {21},
  year         = {1980},
}