Bonn 2025 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 37: Poster – Highly Charged Ions and their Applications

A 37.2: Poster

Donnerstag, 13. März 2025, 17:00–19:00, Tent

Breit interaction in dielectronic recombination of hydrogenlike xenon ions — •Shu-Xing Wang^{1, 2}, Carsten Brandau^{1, 3}, Stephan Fritzsche^{3, 4, 5}, Sebastian Fuchs^{1, 2}, Zoltán Harman^{6, 7}, Christophor Kozhuharov³, Alfred Müller¹, Markus Steck³, and Stefan Schippers^{1, 2} — ¹I. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Giessen, Germany — ²Helmholtz Forschungsakademie Hessen für FAIR (HFHF), GSI Helmholtzzentrum für Schwerionenforschung, Campus Gießen, 35392 Giessen, Germany. — ³GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany. — ⁴Helmholtz-Institut Jena, 07743 Jena, Germany. — ⁵Institut für Theoretische Physik, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany. — ⁶Institut für theoretische Physik, Justus-Liebig-Universität Gießen, 35392 Giessen, Germany — ⁷Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany

Electron-ion collision spectroscopy of the KLL dielectronic recombination (DR) resonances of hydrogenlike xenon ions was performed at a heavy-ion storage ring with a competitive resolving power with x-ray spectroscopy of inner-shell transitions in highly charged ions. The resonance strengths were measured on an absolute scale and compared with results from Multi-Configuration Dirac-Fock (MCDF) calculations. These are in excellent agreement with the experimental findings when considering QED effects on the resonance energies and the Breit interaction. A significant 25% increase was found for the strength of the first resonance group.

Keywords: Breit interaction; dielectronic recombination; storage ring