Excited-State Magnetic Properties of Carbon-like Ca^{14+}
Abstract
We measured the g-factor of the excited-state ^{3}P_{1} in Ca^{14+} ion to be g=1.499032(6) with a relative uncertainty of 4×10^{-6}. The magnetic field magnitude is derived from the Zeeman splitting of a Be^{+} ion, cotrapped in the same linear Paul trap as the highly charged Ca^{14+} ion. Furthermore, we experimentally determined the second-order Zeeman coefficient C_{2} of the ^{3}P_{0}-^{3}P_{1} clock transition. For the m_{J}=0→m_{J^{'}}=0 transition, we obtained C_{2}=0.39±0.04 Hz mT^{-2}, which is to our knowledge the smallest reported for any atomic transition to date. This confirms the predicted low sensitivity of highly charged ions to higher-order Zeeman effects, making them ideal candidates for high-precision optical clocks. Comparison of the experimental results with our state-of-the art electronic structure calculations shows good agreement and demonstrates the significance of the frequency-dependent Breit contribution, negative energy states, and QED effects on magnetic moments.
Details
- Organisation(s)
-
Institute of Quantum Optics
- External Organisation(s)
-
Physikalisch-Technische Bundesanstalt PTB
Technische Universität Braunschweig
University of Delaware
Helmholtz Institute Jena
GSI Helmholtz Centre for Heavy Ion Research
Max Planck Institute for Nuclear Physics
- Type
- Article
- Journal
- Physical review letters
- Volume
- 135
- Pages
- 43002
- No. of pages
- 1
- ISSN
- 0031-9007
- Publication date
- 22.07.2025
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- General Physics and Astronomy
- Electronic version(s)
-
https://doi.org/10.1103/p88p-brnx (Access:
Open
)
