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Parity nonconservation amplitudes are calculated for the 7s-6d transitions ofthe francium isoelectronic sequence (Fr, Ra +, Ac 2+, Th 3+, Pa 4+, U 5+ and Np6+) and for the 6s-5d transitions of the cesium isoelectronic sequence (Cs, Ba+, La 2+, Ce 3+ and Pr 4+). We show in particular that isotopes of La 2+, Ac 2+and Th 3+ ions have strong potential in the search for new physics beyond thestandard model - the PNC amplitudes are large, the calculations are accurateand the nuclei are practically stable. In addition, 232-Th 3+ ions haverecently been trapped and cooled [C. J. Campbell et al., Phys. Rev. Lett. 102,233004 (2009)]. We also extend previous works by calculating the s-s PNCtransitions in Ra + and Ba +, and provide new calculations of several energylevels, and electric dipole and quadrupole transition amplitudes for theFr-like actinide ions.

Parity nonconservation in Fr-like actinide and Cs-like rare-earth-metal ions