Rostock 2019 – scientific programme
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A: Fachverband Atomphysik
A 14: Precision Spectroscopy of atoms and ions IV
A 14.5: Talk
Wednesday, March 13, 2019, 11:30–11:45, S HS 2 Physik
Quantum electrodynamic effects in many-electron highly charged ions — •Halil Cakir1, Vladimir A. Yerokhin2, Natalia S. Oreshkina1, Bastian Sikora1, Zoltán Harman1, and Christoph H. Keitel1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2Center for Advanced Studies, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
Highly charged ions provide a natural source of strong electric fields and, thus, allow us to test QED predictions under extreme conditions. For these kinds of systems, perturbative expansions in the nuclear coupling strength Zα are not feasible and calculations need to be done to all orders in Zα.
A combination of experimental and theoretical values of the g-factor of hydrogen-like ions allowed a significant improvement of the electron mass in terms of atomic mass units in the past and a similar interplay of experiment and theory for highly charged boron-like systems is expected to provide a new access to the value of the fine-structure constant [1] (see also [2]). In this context, we present calculations of the theoretical contributions to the g-factor of boron-like Ar13+, which has been recently measured by the ALPHATRAP Penning-trap setup at the Max Planck Institute for Nuclear Physics. – [1] V. M. Shabaev et al., Phys. Rev. Lett. 96, 253002 (2006); [2] V. A. Yerokhin et al., Phys. Rev. Lett., 116, 100801 (2016).