Investigation of coupled nuclear and electronic motion in H2 photoionization

POSTER

Abstract

We investigate coupled nuclear and electronic dynamics in the photoionization time delays of H$_2$. We use a RABBITT technique to measure the photoionization time delays for several vibrational states of H$_2^+$ across a wide range of photoelectron kinetic energies. We observe discrepancies between our measured photoionization delays and a theoretical model which incorporates the vibrational state dependent ionization potential, but neglects motion of the nuclei. This difference between measurement and theory might indicate time variation of the scattering potential caused by nuclear dynamics. We explore the relative importance of these dynamics near the ionization threshold.

*This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division.

Authors

  • Anna Wang

    • Stanford PULSE Institute, SLAC National Accelerator Laboratory

  • Andrei Kamalov

    • Stanford PULSE Institute, SLAC National Accelerator Laboratory

  • Philip Bucksbaum

    • PULSE Institute/Stanford University
    • Stanford PULSE Institute, SLAC National Accelerator Laboratory
    • PULSE Institute, Stanford University
    • Stanford University
    • Department of Physics and Applied Physics at Stanford University, PULSE Institute
    • Stanford PULSE Institute, Stanford University and SLAC

  • James Cryan

    • SLAC National Accelerator Laboratory
    • Stanford PULSE Institute, SLAC National Accelerator Laboratory
    • Stanford PULSE Institute/LCLS

  • Vladislav Serov

    • Department of Theoretical Physics, Saratov State University

  • Alexander Bray

    • Research School of Physical Sciences, The Australian National University

  • Anatoli Kheifets

    • Research School of Physical Sciences, The Australian National University