Abstract
The multi-configuration Dirac-Fock model is used to evaluatethe magnetic dipole hyperfine interaction constants of the 3d4s(1D)4p 2Do3/2,5/2, 3d4s(3D)4p 4Fo9/2, 3d4s(1D)4p 2Fo5/2,7/2 and 3d2(1D)4s 2D3/2,5/2 levels of atomic scandium. Thewavefunctions are obtained with the active space expansionmethod, where configuration state functions of a specific parityand J value are generated by substitutions from the referenceconfigurations to an active set of orbitals. The active set isthen increased in a systematic way, allowing the convergence ofthe expectation values to be monitored. The calculated magneticdipole hyperfine interaction constants are compared withexperimentally determined values. On the grounds of the level ofagreement between experiment and theory, we confirm three of thehypothetical A-values, previously deduced from high-resolutionFourier transform spectroscopy.
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