Multi-configuration Dirac-Fock calculations of energy levels and transision probabilities in the 2p53s-2p6 spectra of neon-like ions(Z=11, ...,18)

The influence of strong relaxation, correlation and relativistic effects on the energy levels and transition properties of low-lying excitation configuration 2p(5)3s and closed-shell ground state 2p(6) in Neon-like ions(Z = 11, ... 18) are systematically studied using the Multi-configuration Dirac-Fock method( MCDF). The transition energies of electric-dipole allowed ( El) resonance and intercombination transitions for 2p(5)3s (1,3)p(1)(0)-2p(6) S-1(0), magnetic quadrupole transition (M2) for 2p(5)3s (3)p(2)(0)-2p(6) S-1(0) and magnetic dipole transition (M1) for 2p(5)3s P-0(0)-2p(5)3s P-3(1)0 and the radiation lifetimes of the excitation states P-1(1)0, P-3(0)0, O-3(1)0 and P-3(2)0 are presented, and the results are compared with some existing experiments and theoritical calculations available and which shows an good agreement with recent experimental data.