Range-extended EXAFS at the L edge of rare earths using high-energy-resolution fluorescence detection: A study of La in LaOCl
| Autor: | Glatzel, P, de Groot, FMF, Manoilova, O, Grandjean, D, Weckhuysen, BM, Bergmann, U, Barrea, R, Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis |
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| Přispěvatelé: | Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis |
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
ABSORPTION FINE-STRUCTURE
X-ray spectroscopy Materials science SPECTROSCOPY Extended X-ray absorption fine structure Absorption spectroscopy CATALYSTS Electron Condensed Matter Physics Spectral line Electronic Optical and Magnetic Materials SYSTEMS Surface-extended X-ray absorption fine structure SPECTRA Emission spectrum Atomic physics Spectroscopy |
| Zdroj: | Physical review. B, Condensed matter and materials physics, 72(1). American Physical Society |
| ISSN: | 4117-1411 1098-0121 |
| Popis: | We present extended x-ray absorption fine structure (EXAFS) data at the La L2 edge in LaOCl that were recorded on the Lβ1 fluorescence line with an analyzer energy bandwidth of 1.3eV. We show that by taking advantage of the high-energy-resolution fluorescence detection (HERFD) it is possible to extend the energy range for L2 EXAFS analysis beyond the L1 edge if the sample is optically thin. The arguments presented here generally apply to fluorescence-detected absorption spectroscopy if the fluorescence lines are sufficiently separated in energy. Calculations using an atomic multiplet model show that intensity due to 2p4d multiple-electron excitations is reduced in HERFD spectra. The technique has the potential of considerably improving EXAFS analyses at low energies ( |
| Databáze: | OpenAIRE |
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