Quantum electrodynamics effects in the 4s-4ptransitions in Cu-like and Zn-like ions

Multiconfiguration Dirac-Fock energies are compared with experiment for the 4s-4p transitions in Cu-like ions and the 4$s^2$ ${}_{}{}^1{}_{}{}^{}S_0^{}{}_{}{}^{}$–4s4p ${}_{}{}^1{}_{}{}^{}P_1^{}{}_{}{}^{}$ transition in Zn-like ions for Au, Pb, Bi, Th, and U. The Coulomb, Breit, and QED contributions to these transitions are tabulated for selected ions in the range Z=50–92. Results show that the agreement between theory and experiment is good enough to show the importance of QED corrections in the spectra of these highly stripped ions. Contrary to earlier findings by Seely et al. [Phys. Rev. Lett. 57, 2924 (1986)] we find no significant differences between the observed and calculated transition energies after finite-nuclear-size corrections are included.