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High-Precision Measurements of the Bound Electron’s Magnetic Moment

Max Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Johannes Gutenberg-Universität, 55099 Mainz, Germany
Author to whom correspondence should be addressed.
Academic Editor: Elmar Träbert
Received: 19 November 2016 / Revised: 9 January 2017 / Accepted: 10 January 2017 / Published: 21 January 2017
(This article belongs to the Special Issue Perspectives of Atomic Physics with Trapped Highly Charged Ions)
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Highly charged ions represent environments that allow to study precisely one or more bound electrons subjected to unsurpassed electromagnetic fields. Under such conditions, the magnetic moment (g-factor) of a bound electron changes significantly, to a large extent due to contributions from quantum electrodynamics. We present three Penning-trap experiments, which allow to measure magnetic moments with ppb precision and better, serving as stringent tests of corresponding calculations, and also yielding access to fundamental quantities like the fine structure constant α and the atomic mass of the electron. Additionally, the bound electrons can be used as sensitive probes for properties of the ionic nuclei. We summarize the measurements performed so far, discuss their significance, and give a detailed account of the experimental setups, procedures and the foreseen measurements. View Full-Text
Keywords: electron magnetic moment; highly charged ion; quantum electrodynamics electron magnetic moment; highly charged ion; quantum electrodynamics

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Sturm, S.; Vogel, M.; Köhler-Langes, F.; Quint, W.; Blaum, K.; Werth, G. High-Precision Measurements of the Bound Electron’s Magnetic Moment. Atoms 2017, 5, 4.

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