ISSRNS 2012: Abstracts / Synchrotron Radiation in Natural Science Vol. 11, No 1 – 2 (2012) P 64
DIRECT XES TO XAS RELATION FOR OFF-RESONANT EXCITATIONS AT L3 ABSORPTION EDGE: TOWARDS HIGH-RESOLUTION
XAS AT SINGLE-SHOT
J. Szlachetko1,2∗, M. Nachtegaal1, J.-Cl. Dousse3, J. Hoszowska3, E. Kleymenov1,4, M. Janousch1, J. Sa1, O.V. Safonova1, and J.A. van Bokhoven1
1Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
2Institute of Physics, Jan Kochanowski University, 25–406 Kielce, Poland
3Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland
4Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland
Keywords: X-ray emission and X-ray absorption spectroscopy
∗e-mail : jakub.szlachetko@psi.ch
A high energy resolved x-ray absorption spectrum can be reconstructed from an x-ray emis- sion spectrum obtained at a single incident beam energy. We demonstrate a direct relationship be- tween the x-ray emission and absorption process through the generalized Kramers-Heisenberg for- malism. The experiment was performed using exci- tation energies tuned far below the resonant region of the L3 x-ray absorption edge for 5d elements.
Since x-ray emission spectra are collected at a sin- gle excitation energy using dispersive-type spec- trometer for x-ray detection, a point-by-point nor- malization for the incoming beam fluctuation is not needed and the spectral shape is not affected by self-absorption process. Possibility of single- shot x-ray absorption experiment at the femto-time scale using x-ray free electron sources will be dis- cussed.
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