Interaction-induced Rayleigh light scattering from molecular fluids by projection operator technique

Abstract

A projection operator technique is applied to study the influence of interaction-induced mechanisms on density fluctuation-induced isotropic (DFIILS) and orientation fluctuation-induced anisotropic (OFIALS) light scattering. Analytical formulae for the integrated intensity of purely interaction-induced isotropic (PIIILS) and purely interaction-induced anisotropic (PIIALS) light scattering are derived. The integrated intensity of PIIILS as well as PIIALS is found in the form of the difference of ‘square’ and ‘cross’ contributions. Both terms are calculated numerically for liquid N₂ and CO₂ within the first order approximation of the dipole-induced dipole (DID) model. The same order of magnitude is obtained for the ‘square’ and ‘cross’ contributions.