A comparative study of Rayleigh and Raman depolarized light scattering by a pure fluid of isotropic molecules

Double Incoherent Raman Scattering Induced by Molecular Interactions in Gases

“…Therefore a portion of the scattered signal at long range is due to IILS and has been scattered twice. Such IILS intensities have been observed in Rayleigh wings and in vibrational Raman bands for several gases and liquids [3,5]. For each of the interaction induced bands reported up to now in gases, one or two Rayleigh scattering were involved in the double scattering process.…”

“…IILS generally consists of a weak spectral band more or less broadened and partially polarized. Its spectral intensities may include two-body or higher order correlation contributions depending on the density of the sample and on the coherence of the scattered waves involved in the process [4,5]. IILS intensities have been measured in the wings of several bands of atomic or molecular gases [6,7].…”

“…where A v is a function of the Raman frequency v [5] and h i an average over the molecular pairs of the sample.…”

Effect of pressure on the Raman depolarization ratio and the vibrational relaxation of thev1mode of liquid carbon tetrachloride at 22°C and 0–1·1 kbar

“…The fluctuation of the local field is conveniently modelled by assuming the average symmetric structure around which the local field fluctuates. Thibeau et al [17] proposed a model which accounts for the real position fluctuations by means of the occupation fluctuations of a fictitious lattice. A model later proposed by Hyodo and Fujiyama [10] seems more realistic.…”

“…Interaction-induced spectra of molecular liquids, including Raman, Rayleigh, IR, and FIR spectra, can be described by the fluctuation of the local field, which is mainly given by the intermolecular interaction due to the electric multipoles [1][2][3][4][17][18][19][20]. The fluctuation of the local field is conveniently modelled by assuming the average symmetric structure around which the local field fluctuates.…”