Sprecher
Beschreibung
M. Looshorn$^{*1,2}$, C. Brandau$^3$, M. Fogle$^4$, J. Glorius$^3$, E.-O. Hanu$^{3,5,6}$, V. Hannen$^7$,
P.-M. Hillenbrand$^3$, C. Krantz$^3$, M. Lestinsky$^3$, E.-B. Menz$^{3,8}$, R. Schuch$^9$, U. Spillmann$^3$,
K. Ueberholz$^7$, S.-X. Wang$^{1,2}$ and S. Schippers$^{1,2}$
$^1$I. Physikalisches Institut, Justus-Liebig-Universität Gießen, Giessen, 35392, Germany
$^2$Helmholtz Forschungsakedemie Hessen for FAIR (HFHF), Campus Giessen, 35392, Germany
$^3$GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, 64291, Germany
$^4$Department of Physics, Auburn University, Auburn, AL 36832, USA
$^5$Helmholtz-Institut Jena, Jena, 07743, Germany
$^6$Experimental Atomic Physics, Goethe University, Frankfurt, 60323, Germany
$^7$Institut für Kernphysik, Universität Münster, Münster, 48149, Germany
$^8$Institut für Kernphysik, Universität zu Köln, Köln, 50937, Germany
$^9$Department of Physics, Stockholm University, Stockholm, 10691, Sweden
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 Pb$^{78+}$ [1] and measurements of Au$^{75+}$, 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.
$\left[1\right]$ S. Schippers et al., Phys. Rev. Lett. $\textbf{135}$, 113001 (2025).
