title: Transverse acoustic excitations in liquid Ga.
abstract: 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.
authors.affiliation: Center for Materials Research Using Third-Generation Synchrotron Radiation Facilities, Hiroshima Institute of Technology, Hiroshima 731-5193, Japan. hosokawa@cc.it-hiroshima.ac.jp
authors.forename: S
authors.initials: S
authors.lastname: Hosokawa
authors.forename: M
authors.initials: M
authors.lastname: Inui
authors.forename: Y
authors.initials: Y
authors.lastname: Kajihara
authors.forename: K
authors.initials: K
authors.lastname: Matsuda
authors.forename: T
authors.initials: T
authors.lastname: Ichitsubo
authors.forename: W-C
authors.initials: WC
authors.lastname: Pilgrim
authors.forename: H
authors.initials: H
authors.lastname: Sinn
authors.forename: L E
authors.initials: LE
authors.lastname: González
authors.forename: D J
authors.initials: DJ
authors.lastname: González
authors.forename: S
authors.initials: S
authors.lastname: Tsutsui
authors.forename: A Q R
authors.initials: AQ
authors.lastname: Baron