Quasielastic neutron scattering on glycerol

We have done a quasielastic incoherent neutron scattering (QENS) study on the glass-forming glycerol system C(3)H(5)(OH)(3) in the equilibrium liguid phase, in order to determine the temperature and wavenumber dependence of the quasielastic line width. QENS spectra are analyzed in terms of the mode-coupling theory, by convoluting the resolution function with three different models, namely one-Lorentzian, non-lorentzian and two-Lorentzians. We have found that both the non - Lorentzian and the two - Lorentzian models deliver good description of the experimental data that can be qualitatively interpreted in terms of mode coupling theories,but the experimental results show no clear distinction between them.