Recent Advances and New Applications of TimeResolved Xray Absorption Spectroscopy
| Autor: | D. LtzenkirchenHecht, Ronald Frahm, M. Richwin |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Materials science
Extended X-ray absorption fine structure Absorption spectroscopy business.industry Phase (waves) Condensed Matter Physics Atomic and Molecular Physics and Optics Spectral line law.invention Tilt (optics) Optics law Thin film business Mathematical Physics Beam (structure) Monochromator |
| Zdroj: | Physica Scripta. :974 |
| ISSN: | 0031-8949 |
| Popis: | The time-resolved x-ray absorption spectroscopy (QEXAFS) yields structural information about e.g. fast chemical decomposition reactions, thin film deposition, solid-state reactions, and phase transformations. Here we describe a new experimental set-up for QEXAFS experiments enabling the acquisition of full EXAFS spectra with a scan range of up to about 3 keV and a repetition rate of typically 10 Hz. Depending on photon flux and sample quality, repetition rates of up to 40 Hz can be used. The new monochromator design employs a fixed-exit channel cut crystal and a cam driven tilt table for rapid angular oscillations. The detection of fluorescence radiation or surface sensitive techniques can be applied. The new monochromator in combination with refractive x-ray lenses for beam focusing also allows XANES-microtomography in a reasonable time frame. |
| Databáze: | OpenAIRE |
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