Effects of electron correlation, relativity, and nuclear structure on hyperfine constants of Be{sup +} and F{sup 6+}

The hyperfine constants for the ground states of Be{sup +} and F{sup 6+}, and for the two lowest excited states of Be{sup +}, are calculated in a multiconfiguration Dirac-Fock model. Convergence of the calculated magnetic dipole constants is studied as the active set of orbitals is systematically increased. The final results are compared with experimental data and theoretical values obtained from other methods. {copyright} {ital 1999} {ital The American Physical Society}