Many-electron dynamics of atomic processes studied by photon-induced fluorescence spectroscopy

TL;DR

This paper reviews the development of photon-induced fluorescence spectroscopy (PIFS) for studying electron correlations in atomic processes, emphasizing experimental techniques, computational methods, and insights into many-electron effects in rare-gas atoms.

Contribution

It introduces the application of PIFS combined with advanced computational methods like CIPFCP to analyze many-electron effects in atomic dynamics.

Findings

Demonstrated the effectiveness of PIFS in measuring fluorescence emission cross sections.

Compared experimental results with computational predictions for validation.

Highlighted the importance of electron correlations in atomic processes.

Abstract

The progress and the chronology in understanding the influence of electron correlations on the electronic structure of atoms and the dynamics of atomic processes are reviewed focusing on benchmark rare-gas atoms. The contributions and the chronological development of Photon-Induced Fluorescence Spectroscopy (PIFS), measuring {} dispersed-fluorescence emission cross sections upon excitation by single photons provided by monochromatized synchrotron radiation is described. Selected experimental results obtained by complementary techniques are also discussed for comparison. The basic suites of computer programs used for the investigation of the many-electron effects in atoms and the obtained results are analyzed. Special attention is paid to the Configuration Interaction Pauli-Fock approximation with Core Polarization (CIPFCP) method used to interpret the PIFS data.