High-accuracy calculations of term energies and lifetimes of silicon-like ions with nuclear charges Z=24-30

Term energies of the ground and 26 lowest excited levels arising from the 3S(2)3p(,)(2) 3s3p(3) and 3S(2)3p3d configurations in silicon-like ions with nuclear charges Z = 24-30 are evaluated to high accuracy in relativistic multireference many-body perturbation theory calculations. Theory deviates from experiment on the order of 0.01% for the majority, and by less than 0.2% for all but 13, of the experimentally identified energy levels. Anomalous theory-experiment deviations along the isoelectronic sequence for six excited levels clearly indicate that they have been misidentified, among them the solar lines at 237.61 Angstrom and 259.963 Angstrom. New identifications for the misidentified levels are given based on theoretical wavelengths and lifetimes. Hitherto unidentified 3s(2)3p3d (3)Fdegrees(2,3,4) decay lines along the isoelectronic sequence are predicted to well within 0.1 Angstrom accuracy. Calculated lifetimes of the odd-parity 3s(2)3p3d (3)Fdegrees(3) state in silicon-like ions agree reasonably well with experiment, Co13+ being the exception.