Abstract
Energies and oscillator strengths for electric dipole transitions between states with principal quantum numbers 3 and 2 of singly excited oxygenlike ions have been calculated for 32 ions with atomic numbers 10\ensuremath{\le}Z\ensuremath{\le}79 using the multiconfiguration Dirac-Fock method. The calculations include finite nuclear size, Breit interaction, and quantum electrodynamic corrections. The Z dependence of the oscillator strengths throughout the sequence is analyzed for some selected transitions. Effects of both relativity and configuration interaction are seen to be very important for medium and highly charged ions. Numerous irregularities and some sharp discontinuities in the Z dependence of the oscillator strengths are found for many transitions due to the effect of level crossings. A rapid interpolation based on results obtained for a few ionization stages can therefore lead to serious errors.
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