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

C. Alexandridi, D. Platzer, L. Barreau, D. Busto, S. Zhong, M. Turconi, L. Neoričić, H. Laurell, C. L. Arnold, A. Borot, J. F. Hergott, O. Tcherbakoff, M. Lejman, M. Gisselbrecht, E. Lindroth, A. L'Huillier, J. M. Dahlström, P. Salières

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article numberL012012
JournalPhysical Review Research
Issue number1
Publication statusPublished - 2021 Feb 5

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics


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