Observation of strong two-electron-one-photon transitions in few-electron ions

Togawa M, Kuehn S, Shah C, Amaro P, Steinbruegge R, Stierhof J, Hell N, Rosner M, Fujii K, Bissinger M, Ballhausen R, Hoesch M, Seltmann J, Park S, Grilo F, Porter FS, Santos JP, Chung M, Stoehlker T, Wilms J, Pfeifer T, Brown G, Leutenegger MA, Bernitt S, Crespo Lopez-Urrutia JR (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Book Volume: 102

Article Number: 053109

Journal Issue: 5

DOI: 10.1103/PhysRevA.102.052831

Abstract

We resonantly excite the K series of O5+ and O6+ up to principal quantum number n=11 with monochromatic x rays, producing K-shell holes, and observe their relaxation by soft-x-ray emission. Some photoabsorption resonances of O5+ reveal strong two-electron-one-photon (TEOP) transitions. We find that for the [(1s2s)15p3/2]3/2;1/2 states, TEOP relaxation is by far stronger than the radiative decay and competes with the usually much faster Auger decay path. This enhanced TEOP decay arises from a strong correlation with the near-degenerate upper states [(1s2p3/2)14s]3/2;1/2 of a Li-like satellite blend of the He-like Kα transition. Even in three-electron systems, TEOP transitions can play a dominant role, and the present results should guide further research on the ubiquitous and abundant many-electron ions where electronic energy degeneracies are far more common and configuration mixing is stronger.

Authors with CRIS profile

Involved external institutions

Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics Germany (DE) New University of Lisbon / Universidade Nova de Lisboa Portugal (PT) Deutsches Elektronen-Synchrotron DESY Germany (DE) Lawrence Livermore National Laboratory United States (USA) (US) Kyoto University / 京都大学 Kyōto daigaku Japan (JP) Ulsan National Institute of Science and Technology (UNIST) / 울산과학기술원 Korea, Republic of (KR) National Aeronautics and Space Administration (NASA) United States (USA) (US) Friedrich-Schiller-Universität Jena Germany (DE)

How to cite

APA:

Togawa, M., Kuehn, S., Shah, C., Amaro, P., Steinbruegge, R., Stierhof, J.,... Crespo Lopez-Urrutia, J.R. (2020). Observation of strong two-electron-one-photon transitions in few-electron ions. Physical Review A, 102(5). https://dx.doi.org/10.1103/PhysRevA.102.052831

MLA:

Togawa, Moto, et al. "Observation of strong two-electron-one-photon transitions in few-electron ions." Physical Review A 102.5 (2020).

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