Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 38: Precision Spectroscopy of Atoms and Ions III (joint session A/Q)
Q 38.2: Talk
Wednesday, March 4, 2026, 15:00–15:15, N 3
High resolution dielectronic recombination of berylliumlike heavy ions at the CRYRING@ESR storage ring — •Mirko Looshorn1,2, Carsten Brandau3, Mike Fogle4, Jan Glorius3, Elena Hanu3,5,6, Volker Hannen7, Pierre-Michel Hillenbrand3, Claude Krantz3, Michael Lestinsky3, Esther Menz3,8, Reinhold Schuch9, Uwe Spillmann3, Ken Ueberholz7, Shuxing Wang1,2, and Stefan Schippers1,2 — 1Justus-Liebig-Universität Gießen — 2Helmholtz Forschungsakademie Hessen für FAIR (HFHF), GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — 3GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — 4Auburn University — 5Helmholtz-Institut Jena — 6Goethe University Frankfurt — 7Universität Münster — 8Universität zu Köln — 9Stockholm University
Electron-ion collision spectroscopy is a powerful tool for studying highly charged ions. The heavy-ion storage ring CRYRING@ESR offers excellent conditions for high-resolution dielectronic recombination (DR) measurements due to its ultra-cold electron cooler. Such high-precision DR spectroscopy enables sensitive tests of higher-order QED contributions in strong fields. We present recent DR studies of heavy berylliumlike systems, including fully evaluated results for Pb78+ [1] and measurements of Au75+, which are currently under analysis. Comparisons with state-of-the-art theory highlight the potential of these systems to benchmark precision atomic-structure calculations in the high-Z regime.
[1] S. Schippers et al., Phys. Rev. Lett. 135, 113001 (2025).
Keywords: dielectronic recombination; highly charged ions; storage rings