Theoretical study of Raman scattering from pure liquids

A theory is presented to study the Raman spectra of liquids formed by diatomic molecules in the fundamental spectral region. This theory is based on the fact that the Hamiltonian of a liquid sample is invariant under the operations of the full N-symmetric group. It is found, in particular, that the isotropic Raman scattering is a partially coherent and, if the vibrational rotational correlation is neglected, the anisotropic Raman scattering is a totally incoherent process.