Extended calculations of energy levels, radiative properties, and lifetimes for oxygen-like Zn XXIII

The multiconfiguration Dirac-Hartree-Fock (MCDHF) method is used to calculate excitation energies, lifetimes, and radiative transition data for the lowest 672 levels of the 2s22p3nl (n=2 - 5, l=0 - n−1), 2s2p4nl (n=2 - 4, l=0 - n−1), and 2p5nl (n=2 - 3, l=0 - n−1) configurations in Zn XXIII. The comparison of the present excitation energies with available experimental and theoretical results suggests that our MCDHF/RCI calculations are highly accurate with an average uncertainty of a few hundred cm−1. The uncertainty estimation method suggested by Kramida [1, 2], applied to the comparison of the length and velocity line strength values, is used for ranking the transition data. A consistent atomic data set including both energy and transition data with spectroscopic accuracy is provided for the lowest hundreds of states in Zn XXIII.