| Numéro |
J. Phys. Colloques
Volume 47, Numéro C8, Décembre 1986
EXAFS and Near Edge Structure IV
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|
|---|---|---|
| Page(s) | C8-213 - C8-216 | |
| DOI | https://doi.org/10.1051/jphyscol:1986840 | |
EXAFS and Near Edge Structure IV
J. Phys. Colloques 47 (1986) C8-213-C8-216
DOI: 10.1051/jphyscol:1986840
1 Department of Physics, FM-15 University of Washington, Seattle, WA 98195, U.S.A.
2 Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
3 Department of Chemistry, University of Hawaii, Honolulu, HI 96822, U.S.A.
J. Phys. Colloques 47 (1986) C8-213-C8-216
DOI: 10.1051/jphyscol:1986840
SPHERICAL WAVE CORRECTIONS IN ARPEFS
J.J. REHR1, J. MUSTRE DE LEON1, C.R. NATOLI2 et C.S. FADLEY31 Department of Physics, FM-15 University of Washington, Seattle, WA 98195, U.S.A.
2 Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
3 Department of Chemistry, University of Hawaii, Honolulu, HI 96822, U.S.A.
Résumé
A derivation of ARPEFS (Angular Resolved Photoelectron Spectroscopy Fine Structure) which generalizes that based on the plane-wave approximation is reviewed. Spherical wave corrections in the theory are approximated using asymptotic expansions for the one-particle propagators. Single scattering terms are treated exactly in terms of a distance dependent, effective scattering amplitude, [MATH] (θ, [MATH]). This spherical wave approximation (SWA) explains observed corrections to the plane-wave approximation and is found to be in good agreement with the full single scattering spherical wave treatment. The relation between this theory and XAFS (X-ray absorption fine structure) is discussed using a generalized optical theorem.