Pressure dependence of the measured line intensity and super-Lorentzian effects in the absorption spectra of pure HCl
H. Tran, Gang Li, Ngoc Hoa Ngo, Volker Ebert
Abstract
transitions are significantly larger than those predicted using Voigt profiles. Requantized classical molecular dynamics simulations were made in order to predict absorption spectra of pure HCl matching the experimental conditions. The pressure dependence of the intensities retrieved from the calculated spectra as well as the predicted super-Lorentzian behavior between lines are in good agreement with the measurements. Our analysis shows that these effects are essentially due to incomplete collisions, which govern the dipole auto-correlation function at very short times.
Topics & Concepts
Spectral lineVoigt profileAbsorption spectroscopyChemistryAbsorption (acoustics)Line (geometry)DipoleAtomic physicsIntensity (physics)Analytical Chemistry (journal)Molecular physicsOpticsPhysicsMathematicsAstronomyChromatographyOrganic chemistryGeometrySpectroscopy and Laser ApplicationsAtmospheric Ozone and ClimateAtmospheric and Environmental Gas Dynamics