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Hosokawa, S; Inui, M; Kajihara, Y; Matsuda, K; Ichitsubo, T; Pilgrim, W-C; Sinn, H; González, L E; González, D J; Tsutsui, S; Baron, A Q R
Physical review letters, 03/2009, Letnik: 102, Številka: 10Journal Article
The transverse acoustic excitation modes were detected by inelastic x-ray scattering in liquid Ga in the Q range above 9 nm(-1) although liquid Ga is mostly described by a hard-sphere liquid. An ab initio molecular dynamics simulation clearly supports this finding. From the detailed analysis for the S(Q,omega) spectra with a good statistic quality, the lifetime of 0.5 ps and the propagating length of 0.4-0.5 nm can be estimated for the transverse acoustic phonon modes, which may correspond to the lifetime and size of cages formed instantaneously in liquid Ga.
