1. Hard X-Ray Photon-In-Photon-Out Spectroscopy with Lifetime Resolution — of XAS, XES, RIXSS and HERFD.
- Author
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Glatzel, P., Sikora, M., Eeckhout, S. G., Safonova, O. V., Smolentsev, G., Pirngruber, G., van Bokhoven, J. A., Grunewaldt, J.-D., and Tromp, M.
- Subjects
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X-ray spectroscopy , *SPECTRUM analysis , *PHOTONS , *X-rays , *SPECTROMETERS , *X-ray scattering , *MONOCHROMATORS - Abstract
Spectroscopic techniques that aim to resolve the electronic configuration and local coordination of a central atom by detecting inner-shell radiative decays following photoexcitation using hard X-rays are presented. The experimental setup requires an X-ray spectrometer based on perfect crystal Bragg optics. The possibilities arising from non-resonant (X-Ray Emission Spectroscopy — XES) and resonant excitation (Resonant Inelastic X-Ray Scattering Spectroscopy — RIXSS, High-Energy-Resolution Fluorescence Detected (HERFD) XAS) are discussed when the instrumental energy broadenings of the primary (beamline) monochromator and the crystal spectrometer for x-ray emission detection are on the order of the core hole lifetimes of the intermediate and final electronic states. The small energy bandwidth in the emission detection yields line-sharpened absorption features. In transition metal compounds, electron-electron interactions as well as orbital splittings and fractional population can be revealed. Combination with EXAFS spectroscopy enables to extent the k-range beyond unwanted absorption edges in the sample that limit the EXAFS range in conventional absorption spectroscopy. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]
- Published
- 2007
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