Title:
Postcollision-interaction effects in multistep Auger transitions following Ar 1s photoionization
Author(s):
Kosugi, S.; Guillemin, R.; Travnikova, O.; Marchenko, T.; Koulentianos, D.; Martins, J. B.; Hosseini, F.; Püttner, Ralph; Céolin, D.; Journel, L.; Piancastelli, M. N.; Ismail, I.; Koike, F.; Iizawa, M.; Sheinerman, S.; Gerchikov, L.; Azuma, Yoshiro; Simon, M.
Year of publication:
2022
Available Date:
2023-05-09T08:35:29Z
Abstract:
Postcollision-interaction (PCI) effects involving multistep decay processes following Ar 1s photoionization has been studied by Auger electron spectroscopy. The experiment focused on LMM Auger electrons measured in small photon energy steps across the Ar 1s photoionization threshold. Decay pathways that we studied include (1) the Ar+*2p–1→Ar2+3p–2 LMMα Auger process due to a single L hole created by KL fluorescence, (2) the Ar2+*2p–2→Ar3+*2p–13p–2 LMM1 Auger process following double L shell hole states produced by a KLL Auger processes, and (3) the subsequent Ar3+*2p–13p–2→Ar4+3p–4 LMM2 Auger transitions. Particularly pronounced PCI shifts and unusual line shapes compared to the ordinary one-step PCI process were found in the spectra of Auger processes following a KLL Auger first step. The experimental results were compared with calculations based on the semiclassical approach to PCI. Good agreement was found between the calculated and experimental PCI shifts. The result opens possibilities for further studies of the multielectron dynamics between Auger electrons mediated through the photoelectron in these and similar systems.
Part of Identifier:
ISSN (print): 2469-9926
e-ISSN (online): 2469-9934
Keywords:
Atomic & molecular structure
Autoionization & Auger processes
Electronic structure of atoms & molecules
Single- and few-photon ionization & excitation
X-ray beams & optics
DDC-Classification:
539 Moderne Physik
Publication Type:
Wissenschaftlicher Artikel
URL of the Original Publication:
DOI of the Original Publication:
Journal Volume:
106 (2022)
Journaltitle:
Physical review / A : covering atomic, molecular, and optical physics and quantum information
Publisher:
American Institute of Physics
Publisher Place:
Woodbury, NY
Department/institution:
Physik
Institut für Experimentalphysik
Comments:
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