An Upper Bound on the Strongly Forbidden $6S_{1/2}\leftrightarrow 5D_{3/2}$ Magnetic Dipole Transition Moment in {Ba}${}^{+}$

Abstract

We report the results from our first-generation experiment to measure the magnetic-dipole transition moment (M1) between the $6S_{1/2}$ and $5D_{3/2}$ manifolds in Ba${}^{+}$. Knowledge of M1 is crucial for the proposed parity-nonconservation experiment in the ion \cite{Fortson93}, where M1 will be a leading source of systematic error. To date, no measurement of M1 has been made in Ba${}^{+}$, and moreover, the sensitivity of the moment to electron-electron correlations has confounded accurate theoretical predictions. A precise measurement may help to resolve the theoretical discrepancies while providing essential information for planning a future PNC measurement in Ba${}^{+}$. We demonstrate our technique for measuring M1 - including a method for calibrating for stress-induced birefringence introduced by the scientific apparatus - and place an upper bound of $M1<93\pm 39\times 10^{-5}{\mu }_B$.

arXiv comment7 pages, 6 figures

References in corpus (10)

• Using Molecules to Measure Nuclear Spin-Dependent Parity Violation
• Atomic Parity Nonconservation: Electroweak Parameters and Nuclear Structure
• Parity-violating interactions of cosmic fields with atoms, molecules, and nuclei: Concepts and calculations for laboratory searches and extracting limits
• Photoionization and Photoelectric Loading of Barium Ion Traps
• Parity violation in atomic ytterbium: experimental sensitivity and systematics
• Calculation of strongly forbidden M1 transitions and g-factor anomalies in atoms considered for parity non-conservation measurements
• Adiabatic passage in the presence of noise
• In-situ measurement of vacuum window birefringence by atomic spectroscopy
• Measurement scheme and analysis for weak ground state hyperfine transition moments through two-pathway coherent control
• Frequency doubling and stabilization of a Tm,Ho:YLF laser at 2051 nm to a high finesse optical cavity