| Numéro |
J. Phys. Colloques
Volume 48, Numéro C9, Décembre 1987
X-Ray and Inner-Shell ProcessesVol. 1 |
|
|---|---|---|
| Page(s) | C9-1101 - C9-1104 | |
| DOI | https://doi.org/10.1051/jphyscol:19879199 | |
X-Ray and Inner-Shell Processes
Vol. 1
J. Phys. Colloques 48 (1987) C9-1101-C9-1104
DOI: 10.1051/jphyscol:19879199
1 Department of Theoretical Physics, University of Warsaw, PL-00 681 Warsaw, Poland
2 Department of Theoretical Physics, University of Lund, S-223 62 Lund, Sweden
Vol. 1
J. Phys. Colloques 48 (1987) C9-1101-C9-1104
DOI: 10.1051/jphyscol:19879199
EFFECTS OF MANY-BODY INTERACTIONS IN EXTENDED X-RAY ABSORPTION FINE STRUCTURE SPECTROSCOPY (EXAFS)
W. BARDYSZEWSKI1 and L. HEDIN21 Department of Theoretical Physics, University of Warsaw, PL-00 681 Warsaw, Poland
2 Department of Theoretical Physics, University of Lund, S-223 62 Lund, Sweden
Abstract
We present the first a priori derivation of a many-body theory for EXAFS with clearly defined approximations and with final expressions which are feasible for quantitative evaluations. We conclude that the conventional EXAFS expression should be complemented with a term that crudely is the main term, energy-shifted and scaled down by a factor of order 0.2-0.3. Further the f-factors depend significantly, not only on the scattering properties of the individual ions, but also on the electron energy-loss properties of the material itself.