Theory of hyperfine effects in the Zeeman splitting of the2P3state ofLi+

The linked-cluster many-body perturbation theory is applied to the study of the one- and two-electron contributions to the magnetic contact, dipolar, and orbital hyperfine interaction in the $2{}_{}{}^3{}_{}{}^{}P$ state of the ${}_{}{}^6{}_{}{}^{}\mathrm{Li}_{}^{+}{}_{}{}^{}$ and ${}_{}{}^7{}_{}{}^{}\mathrm{Li}_{}^{+}{}_{}{}^{}$ ions. The relative importance of one- and two-electron contributions to the various hyperfine constants are discussed, and comparisons are made between our theoretical results and recent experimental data obtained both by beam-foil spectroscopy and by radio-frequency resonance techniques utilizing electron-impact excitation.