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

C. Alexandridi 1 D. Platzer 1 L. Barreau 1 D. Busto 2 S. Zhong 2 M. Turconi 1 L. Neoričić 2 H. Laurell 3 C. Arnold 2 A. Borot 1 J.-F. Hergott 4 O. Tcherbakoff 4 M. Lejman 1 M. Gisselbrecht 2 E. Lindroth 5 A. l'Huillier 2 J. Dahlström 2 P. Salières 1
1 ATTO - Attophysique
IRAMIS - Institut Rayonnement Matière de Saclay, LIDyl - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
4 SLIC - Serveurs Laser
IRAMIS - Institut Rayonnement Matière de Saclay, LIDyl - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
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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Submitted on : Monday, November 22, 2021 - 2:28:06 PM
Last modification on : Wednesday, November 24, 2021 - 3:43:18 AM

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C. Alexandridi, D. Platzer, L. Barreau, D. Busto, S. Zhong, et al.. Attosecond photoionization dynamics in the vicinity of the Cooper minima in argon. Physical Review Research, American Physical Society, 2021, 3, pp.L012012. ⟨10.1103/PhysRevResearch.3.L012012⟩. ⟨cea-03439614⟩

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