Wavenumber dependence of structural alpha relaxation in a molecular liquid

Details Wavenumber dependence of structural alpha relaxation in a molecular liquid Wavenumber dependence of structural alpha relaxation in a molecular liquid

1998-01-08

arxiv.org/abs/cond-mat/9801066v1

Eur. Phys. J. B 5, 231 (1998)

Physics

Condensed Matter

Statistical Mechanics

6 pages of LaTeX, 4 figures

Scientific paper

10.1007/s100510050439

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.

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