Canadian Journal of Physics · 1973 · 22 citations · 0 references
Natural SciencesChemistryPhysicsMolecular PhysicsSpectroscopic AnalysisSpectroscopyEmission SpectroscopyFluorescence SpectroscopyOptical SpectroscopyRotational SpectroscopyRotational StructureVibrational SpectroscopyMolecular Rotational ConstantsRotational Excited StatesRotational Line StrengthsRotational Transition IntensitiesRotational-vibrational SpectroscopyRotational-vibrational StructureSplittingVibrational Energy Levels
Measurements have been made on the intensities of rotational satellites (ΔN ≠ ΔJ) in selectively excited fluorescence in the B–X system of S 2 . The satellites appear in fluorescence emitted by the ν′ = 4 level but are absent in ν′ = 3 emission. Comparison of our results with line strengths calculated according to the formulation of Tatum and Watson shows that these two adjacent vibrational levels differ in the magnitude and sign of the triplet splitting constant. A reexamination of previous spectral analyses of the B–X system confirms this variation in coupling among B-state vibrational levels.