Structural information sources fluorescence spectroscopy

The X-ray absorption spectroscopy (XAS) methods provide information about the electronic and structural properties of matter. Thus, X-ray absorption nearedge spectroscopy (XANES) is adequate for the observation of local electronic and geometric structures of elements, while extended X-ray absorption fine structure (EXAFS) provides information concerning the coordination environment of metals, metal ions, and nonmetals. To improve time resolution and spectral quahty, sophisticated techniques such as EDXAFS (energy-dispersive X-ray absorption fine structure spectroscopy) and HERFD XAS (high-energy resolution fluorescence detection X-ray absorption spectroscopy) have been developed. All mentioned X-ray methods have a common requirement for high-briUiance X-ray sources such as available at a synchrotron. 

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