The electric-dipole $5s\text{−}5p$ resonance transitions in highly ionized promethiumlike ions have been studied applying relativistic multireference Møller-Plesset second-order perturbation theory. The transition wavelengths are determined to within 0.2 Å in the more highly charged ions, where the level degeneracies are small. For somewhat lighter ions a very large reference space was used in order to account for the many degeneracies. In order to calculate transition probabilities and lifetimes, correlation corrections have been added to the transition operator in the next order. The contributions from the higher orders of the theory—that is, frequency-dependent Breit correction, Lamb shift, and mass shifts—have been estimated. The results are used to reassess spectroscopic data from beam-foil, electron-beam ion-trap, and tokamak observations.

• Received 6 March 2008

DOI:https://doi.org/10.1103/PhysRevA.77.042510