SAMOP 2021 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Highly charged ions and their applications
A 12.4: Poster
Dienstag, 21. September 2021, 16:30–18:30, P
g-Factor Measurements of Heavy Highly Charged Ions in a Penning Trap — •J. Morgner, C. M. König, T. Sailer, F. Heiße, B. Tu, V. A. Yerokhin, B. Sikora, Z. Harman, J. R. Crespo López-Urrutia, C. H. Keitel, S. Sturm, and K. Blaum — Max-Planck-Institute für Kernphysik, Saupfercheckweg 1, DE-69117 Heidelberg
Quantum electrodynamics (QED) has shown great success in describing microscopic systems, e.g. single ions.
In low electromagnetic fields, QED has been tested with unprecedented high precision [1].
Therefore, it is especially interesting to test QED in extremely high fields by comparing theoretical and experimentally measured bound-electron g-factors of single ions.
In extreme cases, e.g. 208Pb81+, only a single electron is bound to the nucleus, which therefore experiences strong electric fields up to 1018 V/m.
The Penning trap setup of ALPHATRAP is dedicated to measure these bound-electron g-factors in even the heaviest highly charged ion systems with a relative precision better than 1· 10−10 [2].
In this contribution, the status of a recent g-factor measurement of hydrogen-like and lithium-like 118Sn is presented.
This probes the bound-electron g-factor of heavy highly charged ions with a precision previously inaccessible.
Further, progress on an electron beam ion trap is presented.
In the future, this could provide ALPHATRAP with even heavier highly charged ion systems up to hydrogen-like lead.
[1] D. Hanneke et al, PRL 100, 120801 (2008)
[2] S. Sturm et al, EPJ 227, 1425*1491 (2019)