Abstract
Abstract The memory function formalism is used to relate the complex dielectric permittivity and depolarized Rayleigh-wing scattering spectrum of an assembly of interacting polar molecules to the pertinent equilibrium orientation correlation factors and molecular or single-particle orientational correlation functions. The theory is applicable to all over the frequency range which characterizes orientational relaxation in liquids (up to ∼5 THz). The confined rotator model of the molecular reorientations is used to evaluate the O-THz absorption and depolarized Rayleigh scattering spectra of liquid methyl iodide (CH3I) and an acceptable fit is obtained.
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