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

Journal Article · Tue May 15 00:00:00 EDT 2007 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774507030212· OSTI ID:21090914

Blagoveshchenskii, N M; Morozov, V A; Novikov, A G; Savostin, V V ^[1]; Shimkevich, A L ^[2]

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1. Leipunskii Institute of Physics and Power Engineering (Russian Federation)
2. Russian Research Centre 'Kurchatov Institute' (Russian Federation)

The frequency spectra of vibrations of Li atoms at temperatures of 22, 227, 397, and 557 deg. C and the lithium-hydrogen melt (98 at % {sup 7}Li, 2 at % H) at 557 deg. 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.

• OSTI ID: 21090914
• Journal Information: Crystallography Reports, Vol. 52, Issue 3; Other Information: DOI: 10.1134/S1063774507030212; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HYDROGEN
INELASTIC SCATTERING
LIQUIDS
LITHIUM
LITHIUM HYDRIDES
NEUTRON DIFFRACTION
SOUND WAVES
SPECTRA
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
VELOCITY