Low frequency light scattering from liquid and supercooled ethyl benzoate

Abstract

The low frequency depolarized and polarized light scattering spectra of ethyl benzoate have been studied over a temperature range of 150 °. At high temperatures, the hydrodynamic theories of Keyes–Kivelson and Andersen–Pecora are adequate to describe the fine structure of the depolarized spectra. At low temperatures, a weak depolarized doublet is seen, corresponding to propagating transverse excitations in the supercooled liquid. The above theories do not correctly describe the observed spectra at low temperatures.