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.