Energies and hyperfine structures of the 1s²2s2p ³P^o state of Be-like ions with Z = 11-18

Nonrelativistic energies and wave functions of the 1s²2s2p ³P^o states of Be isoelectronic sequence (Z = 11-18) are calculated using the full core plus correlation method (FCPC). To obtain the accurate energy level, the relativistic corrections and mass polarization effect are included by using the first-order perturbation theory. The calculated excitation energies (relative to the 1s²2s² ground state) are compared with the experiment. Most of the calculated P3 Jo energies agree with the experiment to within a few inverse centimetres. The calculated hyperfine coupling constants are in good agreement with the latest theoretical data in the literature. Our results may provide valuable reference data for spectral analysis and identification in the future.