Collision-induced scattering for molecules

The object of this investigation was to study experimentally the depolarized integrated Rayleigh intensity induced by collision of optically isotropic molecules CF4, CH4, SF6 at densities up to 350 amagats. We have compared the results at low densities with the pair approximation dipole-induced dipole theory. We have found that at high densities this intensity measured relatively to a Raman vibration line is maximum at a density lower than the critical density.