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Infrared diode laser spectroscopy of the 5<i>g</i>–4<i>f</i> Rydberg transition of nitric oxide
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1994
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EngineeringNitric OxideLaser ApplicationsIon CoreAbsorption SpectroscopyChemistryElectronic Excited StateOptical PropertiesOptical SpectroscopyMolecular SpectroscopyPhysicsInfrared SpectroscopyLaser SpectroscopyAtomic PhysicsQuantum ChemistryRydberg TransitionExcited State PropertyLaser PhotochemistryNatural SciencesSpectroscopyApplied Physics
The 5g – 4f Rydberg transition of nitric oxide has been recorded by high-resolution diode laser absorption spectroscopy. The excited states were generated in a low-pressure ac discharge and studied with population modulation detection. The spectra have been assigned and analysed using the multipole-polarization, or long-range interaction model, and the theoretical background is given, including terms up to <r −5 >. Values of the quadrupole moment and polarizability terms of the NO + (X 1 Σ + ) ion core, as well as a core penetration factor, have been determined in a least-squares fitting procedure. Experimental values for the core properties are compared with recent ab initio calculations.