Density narrowing effect in the collisional cluster scattering of the light by gases

The spectral intensities of a collisional cluster scattering band in CF4 gas have been computed using molecular dynamics. Several densities from 20 to 269 Amagat as well as several models of interaction induced polarizability and of intermolecular potential have been studied. A qualitative agreement with experimental results has been obtained showing the narrowing effect of the gas density on the two-body line shape of the collisional cluster Raman band