Transactions of the Faraday Society · 1967 · 15 citations · 0 references
Natural SciencesChemistryPhysicsCondensed Matter PhysicsMolecular PhysicsSpectroscopyElectronic Excited StatesEmission SpectroscopyMolecular Excited StatesOptical SpectroscopySulfur DioxideSulfur OxidesElectronic State InteractionsExcitationLight Emission SpectraRadiative LifetimesSulfur Dioxide ChemistrySulfur Dioxide EmissionsThermal Emission SpectraVibrational Energy Levels
The thermal emission from shock-heated SO2 stretches from 2500–5000 Å. It can be resolved into contributions from the 3B1, 1B2 and a third (1B1 ?) higher electronic state. The latter has its origin near 2800 Å and predissociates from levels with about 55 kcal/mole vibrational energy. Possible earlier observations of absorption and emission from this state are discussed. Kinetics of electronic excitation are described for each state. The radiative lifetimes are 2 × 10–4, 4 × 10–6 and 2 × 10–7 sec respectively.