Journal article

High energy resolution off-resonant spectroscopy for X-ray absorption spectra free of self-absorption effects

  • Błachucki, Wojciech Department of Physics, University of Fribourg, Switzerland
  • Szlachetko, Jakub Paul Scherrer Institute, Villigen-PSI, Switzerland - Institute of Physics, Jan Kochanowski University, Kielce, Poland
  • Hoszowska, Joanna Department of Physics, University of Fribourg, Switzerland
  • Dousse, Jean-Claude Department of Physics, University of Fribourg, Switzerland
  • Kayser, Yves Department of Physics, University of Fribourg, Switzerland
  • Nachtegaal, M. Paul Scherrer Institute, Villigen-PSI, Switzerland
  • Sá, J. Paul Scherrer Institute, Villigen-PSI, Switzerland
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    30.04.2014
Published in:
  • Physical Review Letters. - 2014, vol. 112, no. 17, p. 173003
English X-ray emission spectra recorded in the off-resonant regime carry information on the density of unoccupied states. It is known that by employing the Kramers-Heisenberg formalism, the high energy resolution off-resonant spectroscopy (HEROS) is equivalent to the x-ray absorption spectroscopy (XAS) technique and provides the same electronic state information. Moreover, in the present Letter we demonstrate that the shape of HEROS spectra is not modified by self-absorption effects. Therefore, in contrast to the fluorescence-based XAS techniques, the recorded shape of the spectra is independent of the sample concentration or thickness. The HEROS may thus be used as an experimental technique when precise information about specific absorption features and their strengths is crucial for chemical speciation or theoretical evaluation.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/303795
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