SAMOP 2023 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 30: Highly Charged Ions and their Applications II

A 30.6: Vortrag

Freitag, 10. März 2023, 16:00–16:15, F107

Bound-Electron g Factor Measurement of Hydrogenlike Tin — •Jonathan Morgner, Charlotte M. König, Tim Sailer, Fabian Heisse, Bingsheng Tu, Vladimir A. Yerokhin, Bastian Sikora, Zoltán Harman, José R. Crespo López-Urrutia, Christoph H. Keitel, and Sven Sturm — Max-Planck Institut für Kernphysik, Heidelberg

Highly charged ions are a great platform to test fundamental physics in strong electric fields. The field strength experienced by a single electron bound to a high-Z nucleus reaches strengths exceeding 10¹⁵ V/cm. Perturbed by the strong field, the g factor of a bound electron is a sensitive tool that can be both calculated and measured to high accuracy. In the recent past, g-factor measurements of low-Z ions reached precisions below 5 × 10⁻¹¹. Following this route, the Alphatrap Penning-trap setup is dedicated to precisely measure bound-electron g factors of the heaviest highly charged ions.

In this contribution, our recent measurement of the bound-electron g factor in hydrogenlike tin will be presented. Comparison with the theoretical calculations allows a stringent test of bound-state QED in strong electric fields.

Additionallly we present the mass measurement of hydrogenlike tin-118, allowing to improve the literature mass by roughly a factor ten. Furthermore, developments for the Hyper-EBIT experiment are presented. This will eventually allow Alphatrap to inject even heavier highly charged ions in our Penning-trap apparatus.