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  • Letter
  • Open Access

Attosecond photoionization dynamics in the vicinity of the Cooper minima in argon

C. Alexandridi1,*, D. Platzer1,*, L. Barreau1, D. Busto2, S. Zhong2, M. Turconi1, L. Neoričić2, H. Laurell2, C. L. Arnold2 et al.

A. Borot1, J.-F. Hergott1, O. Tcherbakoff1, M. Lejman1, M. Gisselbrecht2, E. Lindroth3, A. L'Huillier2, J. M. Dahlström2, and P. Salières1

  • 1Université Paris-Saclay, CEA, CNRS, LIDYL, 91191 Gif-sur-Yvette, France
  • 2Department of Physics, Lund University, Box 118, SE-22100 Lund, Sweden
  • 3Department of Physics, Stockholm University, AlbaNova University Center, SE-10691 Stockholm, Sweden

  • *These authors contributed equally to this work.
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Phys. Rev. Research 3, L012012 – Published 5 February, 2021

DOI: https://doi.org/10.1103/PhysRevResearch.3.L012012

Abstract

Using a spectrally resolved electron interferometry technique, we measure photoionization time delays between the 3s and 3p subshells of argon over a large 34-eV energy range covering the Cooper minima in both subshells. The observed strong variations of the 3s−3p delay difference, including a sign change, are well reproduced by theoretical calculations using the two-photon two-color random-phase approximation with exchange. Strong shake-up channels lead to photoelectrons spectrally overlapping with those emitted from the 3s subshell. These channels need to be included in our analysis to reproduce the experimental data. Our measurements provide a benchmark for multielectronic theoretical models aiming at an accurate description of interchannel correlation.

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Phys. Rev. Research 3, L012012– Published 5 February, 2021
  • Received 29 July 2020
  • Accepted 22 December 2020
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