Nuclear-spin-dependent parity-nonconserving transitions in Ba⁺ and Ra⁺

An experiment to observe parity nonconservation using the |5p⁶6s〉_1/2→|5p⁶5d〉_3/2 transition in Ba⁺ has been proposed [N. Fortson, Phys. Rev. Lett., 70, 2383 (1993)]. We have carried out relativistic configuration-interaction calculations to explore whether the |5p⁶6s〉_1/2→|5p⁶5d〉_5/2 and |6p⁶7s〉_1/2→|6p⁶6d〉_5/2 transitions in Ba⁺ and Ra⁺ respectively are good candidates for carrying out similiar experiments to measure the nuclear anapole moment. Our results suggest that Ra⁺ might be a good candidate for such an experiment.