WAVE-NUMBER DEPENDENCE OF STRUCTURAL ALPHA-RELAXATION IN A MOLECULAR LIQUID

Authors
TOLLE A WUTTKE J SCHOBER H RANDL OG FUJARA F
Citation
A. Tolle et al., WAVE-NUMBER DEPENDENCE OF STRUCTURAL ALPHA-RELAXATION IN A MOLECULAR LIQUID, The European Physical Journal. B: Condensed Matter Physics, 5(2), 1998, pp. 231-236
Citations number
37
Categorie Soggetti
Physics, Condensed Matter
Journal title
The European Physical Journal. B: Condensed Matter Physics → ACNP
ISSN journal
14346028
Volume
5
Issue
2
Year of publication
1998
Pages
231 - 236
Database
ISI
SICI code
1434-6028(1998)5:2<231:WDOSAI>2.0.ZU;2-2
Abstract
Structural alpha relaxation in liquid orthoterphenyl is studied by mea ns 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 wa venumber. These variations are correlated with the static structure fa ctor, in qualitative accord with mode-coupling results for simple liqu ids. Even far above the melting point, alpha relaxation remains non-ex ponential.