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

Summary, in English

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.

• Author: 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
• Department/s: Atomic Physics; Fluid Mechanics; Synchrotron Radiation Research; NanoLund: Centre for Nanoscience; Mathematical Physics
• Publishing year: 2021-02-05
• Language: English
• Publication/Series: Physical Review Research
• Volume: 3
• Issue: 1
• Links: http://dx.doi.org/10.1103/PhysRevResearch.3.L012012
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Atom and Molecular Physics and Optics
• Status: Published
• Project: Attosecond chronoscopy of electron wave-packets probing entanglement and time-ordering of quantum processes
• ISBN/ISSN/Other: ISSN: 2643-1564