The anomalous behavior of several thermal and dynamical properties of liquid quinoline within the temperature range of 260≤T≤310 K is investigated. The neutron quasielastic scattering spectra are analyzed using, for the purpose, previous dynamical information available from NMR relaxation and depolarized light scattering. The temperature dependence of the mass-diffusion and reorientational coefficients is derived from the experimental data, evidencing that only the rotational motion shows a clear deviation from Arrhenius behavior. The presence of shear wave excitations which couple to reorientational motions is manifested as a strong inelastic background which shows a marked wave-vector dependence.

• Received 4 June 1993

DOI:https://doi.org/10.1103/PhysRevE.48.2766