Convergence of the multiple scattering expansion in XAFS and XANES

Conference · Wed Jan 01 04:00:00 EST 1992

OSTI ID:6172922

Rehr, J J

The convergence of the multiple-scattering expansion of XAFS and XANES by explicit path-bypath calculations. The approach is based on the fast scattering matrix formalism of Rehr and Albers, together with an automated path finder and filters that exclude negligible paths. High-order scattering terms are found to be essential, especially at low energies. Several factors including the magnitude of curved wave scattering amplitudes, inelastic losses and multiple-scattering Debye-Waller factors control convergence of the expansion. The convergence is illustrated explicitly for the case of diatomic molecules.

• Research Organization: Washington Univ., Seattle, WA (United States). Dept. of Physics
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG06-90ER45415
• OSTI ID: 6172922
• Report Number(s): DOE/ER/45415-8; CONF-9208221--1; ON: DE93011001
• Country of Publication: United States
• Language: English

Related Subjects

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
CONVERGENCE
DATA ANALYSIS
ELEMENTS
FINE STRUCTURE
MULTIPLE SCATTERING
NONMETALS
OXYGEN
SCATTERING
SERIES EXPANSION
SPECTRA
SPECTROSCOPY
X-RAY SPECTRA
X-RAY SPECTROSCOPY