Energies of 1s2ng and 1s2nh (n=5,6,7, and 8) states for lithium isoelectronic sequence

The nonrelativistic energies for lithium isoelectronic sequence 1s(2)ng and 1s(2)nh (n = 5,6, 7, and 8) states from Z = 3 to 8 are calculated by using a full core plus correlation (FCPC) method with multiconfiguration interaction wave functions. Relativistic and mass-polarization effects on the energy are evaluated as the first-order perturbation theory. Our predicted excitation energies are compared with previous experimental results in the literature.