arXiv · 2310.11119
High-precision determination of $g$ factors and masses of $^{20}\text{Ne}^{9+}$ and $^{22}\text{Ne}^{9+}$
Abstract
We present the measurements of individual bound electron $g$ factors of $^{20}\text{Ne}^{9+}$ and $^{22}\text{Ne}^{9+}$ on the relative level of $0.1\,\text{parts}$ per billion. The comparison with theory represents the most stringent test of bound-state QED in strong electric fields. A dedicated mass measurement results in $m\left(^{20}\text{Ne}\right)=19.992\,440\,168\,77\,(9)\,\text{u}$, which improves the current literature value by a factor of nineteen, disagrees by $4$ standard deviations and represents the most precisely measured mass value in atomic mass units. Together, these measurements yield an electron mass on the relative level of $0.1\,\text{ppb}$ with $m_{\text{e}}=5.485\,799\,090\,99\,(59) \times 10^{-4}\,\text{u}$ as well as a factor of eight improved $m\left(^{22}\text{Ne}\right)=21.991\,385\,098\,2\,(26)\,\text{u}$.
Explore related subjects
Keep this discovery
F. Heiße, M. Door, T. Sailer, P. Filianin, J. Herkenhoff, C. M. König, K. Kromer, D. Lange, J. Morgner, A. Rischka, Ch. Schweiger, B. Tu., Y. N. Novikov, S. Eliseev, S. Sturm, K. Blaum. 2023-10-17. High-precision determination of $g$ factors and masses of $^{20}\text{Ne}^{9+}$ and $^{22}\text{Ne}^{9+}$. https://arxiv.org/abs/2310.11119
Cite the original work for its findings. Save a collection to share your selection of sources.