Theory of photon interference X-ray absorption fine structure
The theory of photon interference x-ray absorption fine structure (piXAFS) is described. Due to coherent x-ray scattering from atoms, a spatial variation of the x-ray intensity is produced inside the sample. The intensity at the x-ray absorbing atom changes according to the incident energy. Thus piX...
| Publié dans: | Journal of synchrotron radiation. - 1994. - 8(2001), Pt 2 vom: 01. März, Seite 204-6 |
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| Format: | Article |
| Langue: | English |
| Publié: |
2001
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| Accès à la collection: | Journal of synchrotron radiation |
| Sujets: | Journal Article |
| Résumé: | The theory of photon interference x-ray absorption fine structure (piXAFS) is described. Due to coherent x-ray scattering from atoms, a spatial variation of the x-ray intensity is produced inside the sample. The intensity at the x-ray absorbing atom changes according to the incident energy. Thus piXAFS in extended absorption spectra is produced. It extends in a wide energy range over absorption edges. For powders the piXAFS formula has equivalent form as the EXAFS formula, and the Fourier transform provides distances of neighboring atoms from the absorbing atom. Due to a long mean free path of the photon, piXAFS for powders contains sharp structures. They are explained as a crystal grain orientation averaging of the x-ray standing wave effect |
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| Description: | Date Completed 06.09.2001 Date Revised 05.06.2019 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 1600-5775 |