Study of the microdynamics of liquid lithium and lithium-hydrogen melt by inelastic neutron scattering

被引：10
|
作者：
Blagoveshchenskii, N. M. [1 ]
Morozov, V. A.
Novikov, A. G.
Pashnev, M. A.
Savostin, V. V.
Shimkevich, A. L.
机构：
[1] Leipunskii Inst Phys & Power Engn, Obninsk 249033, Russia
[2] IV Kurchatov Atom Energy Inst, Russian Res Ctr, Moscow 123182, Russia
来源：
CRYSTALLOGRAPHY REPORTS | 2007年 / 52卷 / 03期
关键词：
D O I：
10.1134/S1063774507030212
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The frequency spectra of vibrations of Li atoms at temperatures of 22, 227, 397, and 557 degrees C and the lithium-hydrogen melt (98 at % Li-7, 2 at % H) at 557 degrees C have been obtained from the experimental neutron inelastic scattering data. On the basis of the frequency spectra, the temperature dependences of the mean-square displacement of Li atoms, the mean-square amplitudes of atomic vibrations, and the velocity autocorrelation function of atoms have been calculated. The speed of sound in liquid lithium has been estimated within the Debye model. The frequency spectra of lithium-hydrogen melt and solid lithium hydride are compared. A generalized frequency spectrum of vibrations of hydrogen atoms in lithium-hydrogen melt is obtained.
引用
收藏
页码：460 / 465
页数：6
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