Laser spectroscopy of trapped short-lived Ra+ions

Abstract

As an important step toward an atomic parity violation experiment in one single trapped Ra${}^{+}$ ion, laser spectroscopy on short-lived $^{212,213,214}\mathrm{Ra}$${}^{+}$ ions was conducted. The isotope shift of the $6 {}^{2}{D}_{3/2}$-$7 {}^{2}{P}_{1/2} $and $6 {}^{2}{D}_{3/2}$-$7 {}^{2}{P}_{3/2} $transitions and the hyperfine structure constants of the $7 {}^{2}{P}_{1/2} $and $6 {}^{2}{D}_{3/2} $states in $^{213}\mathrm{Ra}$${}^{+}$ were measured, which provides a benchmark for the required atomic theory. A lower limit of $232(4)$ ms for $6 {}^{2}{D}_{5/2} $state lifetime was determined.