Journal article

The electronic structure of matter probed with a single femtosecond hard x-ray pulse

  • Szlachetko, Jakub Paul Scherrer Institute, Villigen, Switzerland - Institute of Physics, Jan Kochanowski University, Kielce, Poland
  • Milne, C. J. Paul Scherrer Institute, Villigen, Switzerland
  • Hoszowska, Joanna Department of Physics, University of Fribourg, Switzerland
  • Dousse, Jean-Claude Department of Physics, University of Fribourg, Switzerland
  • Błachucki, Wojciech Department of Physics, University of Fribourg, Switzerland
  • Sà, J. Paul Scherrer Institute, Villigen, Switzerland
  • Kayser, Yves Paul Scherrer Institute, Villigen, Switzerland
  • Messerschmidt, M. Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, California USA
  • Abela, R. Paul Scherrer Institute, Villigen, Switzerland
  • Boutet, S. Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, California USA
  • David, Christian Paul Scherrer Institute, Villigen, Switzerland
  • Williams, G. Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, California USA
  • Pajek, M. Institute of Physics, Jan Kochanowski University, Kielce, Poland
  • Patterson, B. D. Paul Scherrer Institute, Villigen, Switzerland
  • Smolentsev, G. Paul Scherrer Institute, Villigen, Switzerland
  • Bokhoven, J. A. van Paul Scherrer Institute, Villigen, Switzerland - Institute for Chemical and Bioengineering, ETH Zürich, Switzerland
  • Nachtegaal, M. Paul Scherrer Institute, Villigen, Switzerland
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    01.03.2014
Published in:
  • Structural Dynamics. - 2014, vol. 1, no. 2, p. 021101
English Physical, biological, and chemical transformations are initiated by changes in the electronic configuration of the species involved. These electronic changes occur on the timescales of attoseconds (10−18 s) to femtoseconds (10−15 s) and drive all subsequent electronic reorganization as the system moves to a new equilibrium or quasi-equilibrium state. The ability to detect the dynamics of these electronic changes is crucial for understanding the potential energy surfaces upon which chemical and biological reactions take place. Here, we report on the determination of the electronic structure of matter using a single self-seeded femtosecond x-ray pulse from the Linac Coherent Light Source hard x-ray free electron laser. By measuring the high energy resolution off-resonant spectrum (HEROS), we were able to obtain information about the electronic density of states with a single femtosecond x-ray pulse. We show that the unoccupied electronic states of the scattering atom may be determined on a shot-to-shot basis and that the measured spectral shape is independent of the large intensity fluctuations of the incoming x-ray beam. Moreover, we demonstrate the chemical sensitivity and single-shot capability and limitations of HEROS, which enables the technique to track the electronic structural dynamics in matter on femtosecond time scales, making it an ideal probe technique for time-resolved X-ray experiments.
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/303699
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