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A: Fachverband Atomphysik
A 22: Charged ions and their applications
A 22.3: Vortrag
Donnerstag, 17. März 2022, 11:15–11:30, A-H1
Bound Electron g Factor Measurements of Highly Charged Tin — •Jonathan Morgner1, Charlotte M. König1, Tim Sailer1, Fabian Heiße1, Bingsheng Tu3, Vladimir A. Yerokhin2, Bastian Sikora1, Zoltán Harman1, José R. Crespo López-Urrutia1, Christoph H. Keitel1, Sven Sturm1, and Klaus Blaum1 — 1Max-Planck Institut für Kernphysik, Heidelberg — 2Center for Advanced Studies, St. Petersburg — 3Institute of Modern Physics, Shanghai
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 1016 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 of low 10−11. Following this, 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 bound-electron g factors in highly charged 118Sn will be presented. Over the course of several months, g factors for three different charge states have been measured, each allowing a unique test of QED in a heavy highly charged ion, probing different g-factor contributions. Furthermore, progress on a new EBIT setup is presented. This will eventually allow Alphatrap to inject and measure even heavier highly charged systems beyond hydrogenlike lead (Pb81+).