The Dynamic Structure Factor of Expanded Liquid Rubidium
The Dynamic Structure Factor of Expanded Liquid Rubidium
复制标题
膨胀液态铷的动态结构系数
DOI：
10.1002/bbpc.19910950935
复制
发表时间：
1991
期刊：
影响因子：
--
通讯作者：
W. Gläser
中科院分区：
文献类型：
--
作者：
C. Pilgrim;R. Winter;F. Hensel;C. Morkel;W. Gläser
用非弹性中子散射方法，利用格勒诺布尔劳厄-朗之万研究所的In_6能谱仪，在1700K左右测量了膨胀液体Rb的相干动态结构因子S(Q，ω)。在0.55Aω1到2.6A−1的动量转移区，测定了能量从−3.5到2 0 meV的散射定律S(Q，−).讨论了膨胀液态金属在短波长和高频下集体密度激发的存在，并由实验数据估算了Enskog自扩散系数.
By inelastic neutron scattering, the coherent dynamic structure factor S(Q, ω) of expanded liquid rubidium has been measured up to about 1700 K using the IN6 spectrometer at the Institut Laue-Langevin, Grenoble. The scattering law S(Q,ω) has been determined for energy transfers from −3.5 to 20 meV in the momentum transfer region from 0.55 A−1 to 2.6 A−1. The existence of collective density excitations at short wavelength and high frequency for the expanded liquid metal is discussed and the Enskog self-diffusion coefficient is evaluated from the experimental data.