Acoustic Phonon Dynamics in Liquid CCl_4(Condensed Matter : Structure, Mechanical and Thermal Properties)

概要

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The dynamic scattering factor S(Q, ω) was measured by high-resolution inelastic X-ray scattering using intense X-rays from a third-generation synchrotron radiation facility. The observed spectra demonstrate the existence of longitudinal propagating modes at small Q values, although the collective excitations are highly damped (not overdamped) as in the classical van der Waals liquid Ar. The Q-ω relation of the excitation shows a positive dispersion of about 37%, much larger than in liquid metals but similar to that in liquid Ar. The collective dynamics of liquid CCl_4 at small Q values can be interpreted in the framework of classical dense liquids.
社団法人日本物理学会の論文
2004-07-15