Ab initio calculation of 1s22l3l′4l" energy levels and E1 transition probabilities for O3+

Transition energies and E1 transition rates for the boron-like ion O3+ have been calculated using the multireference relativistic configuration interaction (MR RCI) method based on the no-pair Dirac-Coulomb-Breit Hamiltonian. Over 200 energy levels with total angular momentum 1/2, 3/2, 5/2 and 9/2 of even and odd parities were obtained. Analytic basis sets of Gaussian-type functions are employed to expand the upper and lower components of the Dirac four-spinors in the matrix Dirac-Fock self-consistent field and relativistic MR CI procedures. Transition energies and E1 transition rates are compared with experimental values and other theoretical results.