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

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 stringent test for multielectronic theoretical models aiming at an accurate description of inter-channel correlation.

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Cited by in corpus (8)

• Measuring the quantum state of photoelectrons
• Analysis of RABITT time delays using the stationary multi-photon molecular R-matrix approach
• Wigner Time Delay in Photoionization: A 1D Model Study
• Relation Between Photoionisation Cross Sections and Attosecond Time Delays
• Resonant photoionization and time delay
• Circular RABBITT goes under threshold
• Active stabilization for ultralong acquisitions in an attosecond pump-probe beamline
• Attosecond Time Delays at Cooper Minima in Valence-Shell Photoionization of Alkali and Alkaline-Earth Metal Atoms