Relativistic energy levels, lifetimes, and transition probabilities for the sodium-like to argon-like sequences

Energy levels, lifetimes, and transition probabilities for transitions between computed levels are reported for the Na-like ( Z = 11, … , 26) to Ar-like ( Z = 18, … , 30) sequences. Several methods have been used—non-orthogonal spline CI, multiconfiguration Hartree-Fock (MCHF), and also multiconfiguration Dirac-Hartree-Fock (MCDHF). The first two methods included relativistic effects through the Breit-Pauli Hamiltonian, omitting only the orbit-orbit interaction. Both allowed (E1) and some forbidden (M1, E2, M2, E3) transitions are reported.