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Generalized Ramsauer-Townsend effect in extended x-ray-absorption fine structure
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UNSPECIFIED (2001) Generalized Ramsauer-Townsend effect in extended x-ray-absorption fine structure. PHYSICAL REVIEW B, 6418 (18). -. ISSN 0163-1829
Full text not available from this repository.Abstract
Discontinuities in the phase of several double scattering path contributions to the calculated extended x-ray-absorption fine structure (EXAFS) at the zinc K edge in the zinc tetraimidazole cluster have been observed. The double scattering contribution has an amplitude which is close to zero and undergoes a jump discontinuity of pi in the phase. The position in k space of this feature is sensitive to the geometry of the path and the atoms involved. The origin of this discontinuity is traced to a generalized Ramsauer-Townsend resonance at a nitrogen atom. With a shift of geometry the energy of the discontinuity is found to move in a systematic manner. a consequence of the curvature of the photoelectron wave front, the typical EXAFS scattering being of Fresnel type. The results are discussed in the context of Nye-Berry phase dislocations and the implications for EXAFS analysis are examined.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics |
| Journal or Publication Title: | PHYSICAL REVIEW B |
| Publisher: | AMERICAN PHYSICAL SOC |
| ISSN: | 0163-1829 |
| Date: | 1 November 2001 |
| Volume: | 6418 |
| Number: | 18 |
| Number of Pages: | 4 |
| Page Range: | - |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/11548 |
Data sourced from Thomson Reuters' Web of Knowledge
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