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arXiv · 1906.00881

$g$-factor of Boronlike Argon $^{40}\textrm{Ar}^{13+}$

I. Arapoglou·A. Egl·M. Höcker·T. Sailer·B. Tu·A. Weigel·R. Wolf·H. Cakir·V. A. Yerokhin·N. S. Oreshkina·V. A. Agababaev·A. V. Volotka·D. V. Zinenko·D. A. Glazov·Z. Harman·C. H. Keitel·S. Sturm·K. Blaum
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Abstract

We have measured the ground-state $g$-factor of boronlike argon $^{40}\textrm{Ar}^{13+}$ with a fractional uncertainty of \SI{1.4e-9}{} with a single ion in the newly developed ALPHATRAP double Penning-trap setup. The here obtained value of $g=0.663\,648\,455\,32(93)$ is in agreement with our theoretical prediction of $0.663\,648\,12(58)$. The latter is obtained accounting for quantum electrodynamics, electron correlation, and nuclear effects within the state-of-the-art theoretical methods. Our experimental result distinguishes between existing predictions that are in disagreement, and lays the foundations for an independent determination of the fine-structure constant.

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I. Arapoglou, A. Egl, M. Höcker, T. Sailer, B. Tu, A. Weigel, R. Wolf, H. Cakir, V. A. Yerokhin, N. S. Oreshkina, V. A. Agababaev, A. V. Volotka, D. V. Zinenko, D. A. Glazov, Z. Harman, C. H. Keitel, S. Sturm, K. Blaum. 2019-06-03. $g$-factor of Boronlike Argon $^{40}\textrm{Ar}^{13+}$. https://doi.org/10.1103/physrevlett.122.253001

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