Energies and E1, M1, E2, and M2 transition rates for states of the 2s²2p⁴, 2s2p⁵, and 2p⁶ configurations in oxygen-like ions between F II and Kr XXIX^⋆

¹ Lithuanian University of Educational Science, Studentų 39, 08106 Vilnius, Lithuania
e-mail: pavel.rynkun@gmail.com
² Group for Materials Science and Applied Mathematics, Malmö University, 20506 Malmö, Sweden
³ Vilnius University, Institute of Theoretical Physics and Astronomy, A. Goštauto 12, 01108 Vilnius, Lithuania
⁴ National Institute of Standards and Technology, Gaithersburg, MD 20899-8420, USA

Received: 30 May 2013
Accepted: 22 July 2013

Abstract

Based on relativistic wave functions from multiconfiguration Dirac-Hartree-Fock and configuration interaction calculations, E1, M1, E2, M2 transition rates, weighted oscillator strengths, and lifetimes are evaluated for the states of the (1s²)2s²2p⁴,2s2p⁵, and 2p⁶ configurations in all oxygen-like ions between F II and Kr XXIX. Valence and core-valence correlation effects were accounted for through single-double multireference (SD-MR) expansions to increasing sets of active orbitals. Computed energies are compared with the NIST recommended values, generally differing by less than 600 cm^-1. For some spectra, significantly larger differences are found and our results are in better agreement with Edlén interpolated values. For levels where experimental lifetimes are available, the agreement is within experimental uncertainty for all but a few lowly ionized spectra. Complete Online tables of energy levels and transition data are available.