Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2000-09-11
Physics
Condensed Matter
Disordered Systems and Neural Networks
5 pages, 4 .PS figures
Scientific paper
10.1103/PhysRevLett.85.4076
New inelastic X-ray scattering experiments have been performed on liquid lithium in a wide wavevector range. With respect to the previous measurements, the instrumental resolution, improved up to 1.5 meV, allows to accurately investigate the dynamical processes determining the observed shape of the the dynamic structure factor, $S(Q,\omega)$. A detailed analysis of the lineshapes shows the co-existence of relaxation processes with both a slow and a fast characteristic timescales, and therefore that pictures of the relaxation mechanisms based on a simple viscoelastic model must be abandoned.
Balucani Umberto
Ruocco Giancarlo
Scopigno Tullio
Sette Francesco
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