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Orientation-dependent stereo Wigner time delay and electron localization in a small molecule.

  • Vos J Department of Physics, ETH Zurich, 8093 Zurich, Switzerland. jvos@phys.ethz.ch.
  • Cattaneo L Department of Physics, ETH Zurich, 8093 Zurich, Switzerland.
  • Patchkovskii S Max Born Institute, 12489 Berlin, Germany.
  • Zimmermann T Max Planck Institute for the Physics of Complex Systems, D-01187 Dresden, Germany.
  • Cirelli C Department of Physics, ETH Zurich, 8093 Zurich, Switzerland.
  • Lucchini M Department of Physics, ETH Zurich, 8093 Zurich, Switzerland.
  • Kheifets A Research School of Physics and Engineering, The Australian National University, Canberra ACT 0200, Australia.
  • Landsman AS Max Planck Institute for the Physics of Complex Systems, D-01187 Dresden, Germany.
  • Keller U Department of Physics, ETH Zurich, 8093 Zurich, Switzerland.
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  • 2018-06-23
Published in:
  • Science (New York, N.Y.). - 2018
Multidisciplinary
English Attosecond metrology of atoms has accessed the time scale of the most fundamental processes in quantum mechanics. Transferring the time-resolved photoelectric effect from atoms to molecules considerably increases experimental and theoretical challenges. Here we show that orientation- and energy-resolved measurements characterize the molecular stereo Wigner time delay. This observable provides direct information on the localization of the excited electron wave packet within the molecular potential. Furthermore, we demonstrate that photoelectrons resulting from the dissociative ionization process of the CO molecule are preferentially emitted from the carbon end for dissociative 2Σ states and from the center and oxygen end for the 2Π states of the molecular ion. Supported by comprehensive theoretical calculations, this work constitutes a complete spatially and temporally resolved reconstruction of the molecular photoelectric effect.
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  • English
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bronze
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https://sonar.ch/global/documents/155290
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