On-line Excited-State Laser Spectroscopy of Trapped Short-Lived Ra$^+$ Ions

• Main Authors: Versolato, O. O, Giri, G. S, Wansbeek, L. W, Berg, J. E. van den, van der Hoek, D. J, Jungmann, K, Kruithof, W. L, Onderwater, C. J. G, Sahoo, B. K, Santra, B, Shidling, P. D, Timmermans, R. G. E, Willmann, L, Wilschut, H. W
• Format: Journal Article
• Language: English
• Published: 29.03.2010
• Subjects: Physics - Atomic Physics; Physics - Nuclear Experiment
• DOI: 10.48550/arxiv.1003.5580

As an important step towards an atomic parity violation experiment in one single trapped Ra$^+$ ion, laser spectroscopy experiments were performed with on-line produced short-lived $^{212,213,214}$Ra$^+$ ions. The isotope shift of the $6\,^2$D$_{3/2}$\,-\,$7\,^2$P$_{1/2}$ and $6\,^2$D$_{3/2}$\,-\,$7\,^2$P$_{3/2}$ transitions and the hyperfine structure constant of the $7\,^2$S$_{1/2}$ and $6\,^2$D$_{3/2}$ states in $^{213}$Ra$^+$ were measured. These values provide a benchmark for the required atomic theory. A lower limit of $232(4)$ ms for the lifetime of the metastable $6\,^2$D$_{5/2}$ state was measured by optical shelving.