Attosecond photoionization dynamics in the vicinity of the Cooper minima in argon - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Access content directly
Journal Articles Physical Review Research Year : 2021

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

C. Alexandridi
  • Function : Author
D. Platzer
  • Function : Author
L. Barreau
D. Busto
S. Zhong
M. Turconi
  • Function : Author
L. Neoričić
H. Laurell
A. Borot
  • Function : Author
J.-F. Hergott
  • Function : Author
O. Tcherbakoff
  • Function : Author
M. Lejman
M. Gisselbrecht
E. Lindroth
A. L'Huillier
P. Salières

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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cea-03439614 , version 1 (22-11-2021)

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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, 2021, 3, pp.L012012. ⟨10.1103/PhysRevResearch.3.L012012⟩. ⟨cea-03439614⟩
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