Energies, fine structure, and radiative transitions of the high-lying core-excited states ⁶S^e,o(n) and ⁶P^e,o(n) (n=1-5) for the boron isoelectronic sequence

The Rayleigh-Ritz variation method using a multiconfiguration interaction wavefunction is carried out on the high-lying core-excited states ⁶S^e,o(n) and ⁶P^e,o(n) (n=1-5) for the boron isoelectronic sequence (Z=6-10), including mass polarization and relativistic corrections. Energy levels, fine structure, transition rates, and transition wavelengths for this system are calculated. Some energy levels of the high- n states are reported for the first time. Wavelengths of the electric-dipole transitions from these core-excited sextet states with quantum electro-dynamical effects and higher-order relativistic corrections are included. The lifetimes of the 1s2s2p²3p ⁶S^o, 1s2p³3s ⁶S^o, 1s2s2p²3s ⁶P, 1s2s2p²3d ⁶P, and 1s2p³3p ⁶P states for the boron isoelectronic sequence are also reported. Our calculated results agree well in most cases with available theoretical and experimental data in the literature.