2000/09/30 by T. Scopigno, U. Balucani, Giancarlo Ruocco +2 · 3 citations
Engineering · Materials Science · Physics and Astronomy · #Material Dynamics and Properties #Spectroscopy and Quantum Chemical Studies #Thermodynamic and Structural Properties of Metals and Alloys #cond-mat.dis-nn
paper · pdf · doi:10.1103/physrevlett.85.4076
5 pages, 4 .PS figures
arxiv created 2000/10/11 · openalex publication_date 2000/11/06 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
New inelastic x-ray scattering experiments have been performed on liquid lithium in a wide wave vector range. With respect to the previous measurements, the instrumental resolution, improved up to 1. 5 meV, allows one to accurately investigate the dynamical processes determining the observed shape of the dynamic structure factor S(Q, omega). A detailed analysis of the line shapes shows the coexistence of relaxation processes with both slow and fast characteristic time scales, and therefore shows that pictures of the relaxation mechanisms based on a simple viscoelastic model must be abandoned.