Wavenumber dependence of structural alpha relaxation in a molecular liquid
arXiv:cond-mat/9801066 · doi:10.1007/s100510050439
Abstract
Structural alpha relaxation in liquid orthoterphenyl is studied by means of coherent neutron time-of-flight and backscattering spectroscopy over a large temperature range. Not only amplitude and relaxation time but also the spectral line shape show a significant variation with wavenumber. As expected from mode coupling theory, these variations are correlated with the static structure factor. Even far above the melting point, alpha relaxation remains non-exponential.
6 pages of LaTeX, 4 figures