X-ray-absorption fine structure in embedded atoms

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.12347· OSTI ID:5006965

Rehr, J J ^[1]; Booth, C H; Bridges, F ^[2]; Zabinsky, S I ^[1]

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1. Department of Physics, University of Washington, Seattle, Washington 98195 (United States)
2. Department of Physics, University of California Santa Cruz, Santa Cruz, California 95064 (United States)

Oscillatory structure is found in the atomic background absorption in x-ray-absorption fine-structure (XAFS) measurements. This atomic XAFS (AXAFS) arises from scattering within an embedded atom, and is analogous to the Ramsauer-Townsend effect. Calculations and measurements confirm the existence of AXAFS and show that it can dominate contributions such as multielectron excitations. The structure is sensitive to chemical effects and thus provides a probe of bonding and exchange effects on the scattering potential.

• DOE Contract Number: FG06-90ER45415
• OSTI ID: 5006965
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:17; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665430* -- Other Topics in Quantum Fluids & Solids-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
ALKALINE EARTH METALS
BARIUM
CERIUM
DATA ANALYSIS
ELEMENTS
FINE STRUCTURE
FUNCTIONS
METALS
OSCILLATIONS
PRASEODYMIUM
RARE EARTHS
SPECTRA
SPECTROSCOPY
SPLINE FUNCTIONS
X-RAY SPECTRA