Energies of 1 s ² ng and 1 s ² nh ( n = 5,6,7, and 8) States for Lithium Isoelectronic Sequence

Abstract

The nonrelativistic energies for lithium isoelectronic sequence 1s2ng and 1s2nh (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.