HIGH-FREQUENCY DYNAMICS IN A MOLTEN BINARY ALLOY
HIGH-FREQUENCY DYNAMICS IN A MOLTEN BINARY ALLOY
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熔融二元合金的高频动力学
DOI：
10.1103/physrevlett.80.2141
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发表时间：
1998
影响因子：
8.6
通讯作者：
B. Roessli
中科院分区：
文献类型：
--
作者：
M. Alvarez;F. Bermejo;P. Verkerk;B. Roessli
重阻尼激发发现在熔融锂铅的非弹性中子散射。该实验涵盖了一个运动学范围，使明确的特征，这种激励的波矢量依赖的频率，寿命和信号幅度的研究手段。结果表明，被采样的激发表现出的功能，大大偏离那些预期的传播的声学模式（应涉及同相原子位移）。[S0031-9007（98）05534-3]
Heavily damped excitations are found in molten Li4Pb by inelastic neutron scattering. The experiment covered a kinematic range which enabled an unambiguous characterization of such excitations by means of the study of the wave vector dependence of their frequencies, lifetimes, and signal amplitudes. It is shown that the excitations being sampled exhibit features which substantially deviate from those expected for the propagation of an acoustic mode (which should involve in-phase atomic displacements). [S0031-9007(98)05534-3]