COLLECTIVE MODES AT VERY SHORT WAVELENGTHS IN LIQUID LITHIUM

被引：39

作者：

DEJONG, PHK

VERKERK, P

DEGRAAF, LA

机构：

[1] Interfacultair Reactor Instituut, Technische Universiteit Delft

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1993年 / 156卷

关键词：

D O I：

10.1016/0022-3093(93)90127-J

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Inelastic neutron scattering data on liquid Li-7 at 470 K are presented. The results from two measurements are combined: the first with neutrons of 20 meV and a resolution at the detectors of 1.3 meV, the second with 525 meV neutrons and 18 meV resolution. This resolution enables one to investigate short-wavelength sound modes over a wavevector range 10 < kappa < 33 nm 1. The data are analyzed in terms of extended hydrodynamic modes and the sound dispersion omega(s)(kappa) over this entire kappa-range are determined. The data indicate that very short wavelength sound modes do exist up to at least kappa = 33 nm-1. The position of the top of the longitudinal current correlation function deviates significantly from omega(s)(kappa). The present data confirm recent inelastic X-ray scattering experiments on liquid lithium as well as a neutron scattering experiment on liquid cesium.

引用

页码：48 / 52

页数：5

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