Breit-Pauli energy levels and transition rates for the carbonlike sequence

Breit-Pauli results for energy levels, lifetimes, and some transition data are reported for all levels up to 2s(2)2p3d P-1(J)o of the C-like spectrum for 7 less than or equal to Z less than or equal to 15. For all but the low est members of the sequence, these include all the states of the 2s(2)2p(2) , 2s2p(3), 2p(4), 2s(2)2p3s, 2s(2)2p3p, and 2s(2)2p3d configurations. For c arbon, only the states for the 2s(2)2p(2), 2s2p(3), and 2s(2)2p3s configura tions are included. A simultaneous optimization scheme was applied so that a radial basis could be determined for a set of terms that mix in the Breit -Pauli approximation. All results have been posted at a Web site. In this p aper, lifetimes are reported and, in addition, results for N II, O III, and Si IX are critically evaluated. Energy levels are compared with experiment and adjusted transition rates, along with uncertainty estimates are presen ted. Selected results are compared with other theory and experiment.