Neutron and light scattering study of supercooled glycerol

Relaxation dynamics was investigated in the hydrogen-bonded glass former glycerol using incoherent neutron scattering and depolarized light scattering. The neutron data have a q-independent form in the intermediate β-relaxation regime implying factoratization of the q and ω dependences. Similar susceptibility spectra obtained from both data sets qualitatively resembling the mode coupling theory scenario. Quantitative fits indicate apparent deviations of the exponents from mode coupling theory predictions suggesting that the influence of vibrational modes is severe in network glass formers.