NEUTRON AND LIGHT-SCATTERING STUDY OF SUPERCOOLED GLYCEROL

Relaxation dynamics was investigated in the hydrogen-bonded glass form er glycerol using incoherent neutron scattering and depolarized light scattering. The neutron data have a q-independent form in the intermed iate beta-relaxation regime implying factorization of the q and omega dependences. Similar susceptibility spectra were obtained from both da ta sets qualitatively resembling the mode coupling theory scenario. Qu antitative fits indicate apparent deviations of the exponents from mod e coupling theory predictions suggesting that the influence of vibrati onal modes is severe in network glass formers.