Collision-Induced Light Scattering Observed at the Frequency Region of Vibrational Raman Bands

We show that collision-induced light scattering at the frequency range of vibrational Raman bands of perturbed molecules can be observed and analyzed and that for gases the scattering process is similar to the one of depolarized Rayleigh scattering. In particular the $I_{\mathrm{VH}}$ component of the totally symmetric ${\nu }_1$ vibration of S${\mathrm{F}}_6$ and C${\mathrm{F}}_4$ has been studied. The depolarized light scattering at the ${\nu }_1$ Raman band of liquid S${\mathrm{F}}_6$ is also discussed.