CALCULATIONS WITH SPECTROSCOPIC ACCURACY : ENERGIES AND TRANSITION RATES IN THE NITROGEN ISOELECTRONIC SEQUENCE FROM Ar XII TO Zn XXIV

Combined relativistic configuration interaction and many-body perturbation calculations are performed for the 359fine-structure levels of the 2s2 2p3, 2 s2p4, 2p5, 2s2 2p2 3l, 2 s2p3 3l, 2p4 3l, and 2s2 2p2 4l configurations in N-likeions from Ar XII to Zn XXIV. Complete and consistent data sets of energies, wavelengths, radiative rates, oscillatorstrengths, and line strengths for all possible electric dipole, magnetic dipole, electric quadrupole, and magneticquadrupole transitions among the 359 levels are given for each ion. The present work significantly increases theamount of accurate data for ions in the nitrogen-like sequence, and the accuracy of the energy levels is high enoughto enable the identification and interpretation of observed spectra involving the n=3, 4 levels, for whichexperimental values are largely scarce. Meanwhile, the results should be of great help for modeling and diagnosingastrophysical and fusion plasmas