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Microscopic dynamics in trivalent liquid Ga

机译:三价液态镓的微观动力学

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The dynamic structure factor S(Q, omega) of liquid Ga was measured at 100degreesC using high-resolution inelastic X-ray scattering. The obtained spectra clearly demonstrate the existence of longitudinal propagating modes at small Q. The Q-omega relation of the excitations shows a so-called positive dispersion of about 15%, which is much smaller than findings from an inelastic neutron-scattering experiment carried out at higher temperature. The spectra are well reproduced by an analysis using memory function formalism with two viscous decay channels. (C) 2004 Elsevier B.V. All rights reserved.
机译:使用高分辨率非弹性X射线散射在100摄氏度下测量液体Ga的动态结构因子S(Q,ω)。所获得的光谱清楚地表明了在小Q处存在纵向传播模式。激发的Q-ω关系显示出约15%的所谓正色散,这比进行的非弹性中子散射实验的结果小得多。在更高的温度下。通过使用带有两个粘性衰减通道的记忆函数形式主义进行的分析,可以很好地再现光谱。 (C)2004 Elsevier B.V.保留所有权利。

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