Abstract
The dynamic structure factor S ( Q ,ω) of liquid ( l -) Mg was measured at 700°C using high-resolution inelastic X-ray scattering. Based on the high-quality experimental data presented in this paper, we discuss the particle dynamics in dense l -Mg using the generalized hydrodynamic theory for phonon excitations. The particle motion in this liquid is influenced by collective longitudinal modes, similar to other simple liquid metals such as l -alkali metals. The Q dependence of quasielastic line width can be interpreted based on an existing theory modified from the de Gennes formalism.
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