Isotropic collision-induced scattering by CF4 in a Raman vibrational band

Light-scattering intensities and depolarization ratio data have been recorded at room temperature for gaseous tetrafluoromethane in the collision-induced band of the Raman vibrational line ν1=908 cm−1. For the first time, binary isotropic intensities of the ν1-Raman band are reported in absolute uni...

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Veröffentlicht in:The Journal of chemical physics 1999-06, Vol.110 (23), p.11303-11308
Hauptverfasser: Godet, J.-L., Elliasmine, A., Le Duff, Y., Bancewicz, T.
Format: Artikel
Sprache:eng
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Zusammenfassung:Light-scattering intensities and depolarization ratio data have been recorded at room temperature for gaseous tetrafluoromethane in the collision-induced band of the Raman vibrational line ν1=908 cm−1. For the first time, binary isotropic intensities of the ν1-Raman band are reported in absolute units for Stokes frequency shifts up to 110 cm−1. From comparison with theoretical semiclassical computations of the dipole-multipole spectrum contributions, evaluations of the first derivatives of the successive dipole-multipole polarizability tensors are provided. These results are coherent with those obtained from corresponding depolarized intensities. Moreover, the agreement with ab initio quantum-chemistry calculations of the CF4 multipolar polarizabilities is satisfactory.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.478004