Canadian Journal of Physics · 1984 · 41 citations · 0 references
Natural SciencesChemistryPhysicsPhysical ChemistrySpectroscopic AnalysisSpectroscopyHyperfine StructureLaser SpectroscopyMolecular Angular MomentumRotational SpectroscopyRotational StructureSpin-orbit CouplingHyperfine Structure AnalysisHyperfine Structure In Rotational SpectraHyperfine Structure MeasurementsMolecular Beam ExperimentsMolecular Beam SpectroscopyRotational Line StrengthsSpin OrderingSpin-orbit Splitting
Rotational analysis of the BaI C 2 Π–X 2 Σ + (0,0) band system has been performed using molecular beam and laser spectroscopic techniques. This band is free from local perturbations, although significant interaction of the C 2 Π state with several other 2 Σ + states is indicated. The spin-orbit ordering of the C state is confirmed to be regular, while the Λ-doubling parameters p and q are opposite in sign. Apparent anomalies in the line strengths of various rotational branches in the two spin-orbit sub-bands are related to observed differences in the hyperfine structure of the C-state spin-orbit components.