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

Abstract

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.

Authors:
; ; ; ;  [1];  [2]
  1. Leipunskii Institute of Physics and Power Engineering (Russian Federation)
  2. Russian Research Centre 'Kurchatov Institute' (Russian Federation)
Publication Date:
OSTI Identifier:
21090914
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 52; Journal 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)
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Blagoveshchenskii, N. M., Morozov, V. A., Novikov, A. G., Pashnev, M. A., E-mail: pashma@ippe.ru, Savostin, V. V., and Shimkevich, A. L.. Study of the microdynamics of liquid lithium and lithium-hydrogen melt by inelastic neutron scattering. United States: N. p., 2007. Web. doi:10.1134/S1063774507030212.
Blagoveshchenskii, N. M., Morozov, V. A., Novikov, A. G., Pashnev, M. A., E-mail: pashma@ippe.ru, Savostin, V. V., & Shimkevich, A. L.. Study of the microdynamics of liquid lithium and lithium-hydrogen melt by inelastic neutron scattering. United States. doi:10.1134/S1063774507030212.
Blagoveshchenskii, N. M., Morozov, V. A., Novikov, A. G., Pashnev, M. A., E-mail: pashma@ippe.ru, Savostin, V. V., and Shimkevich, A. L.. Tue . "Study of the microdynamics of liquid lithium and lithium-hydrogen melt by inelastic neutron scattering". United States. doi:10.1134/S1063774507030212.
@article{osti_21090914,
title = {Study of the microdynamics of liquid lithium and lithium-hydrogen melt by inelastic neutron scattering},
author = {Blagoveshchenskii, N. M. and Morozov, V. A. and Novikov, A. G. and Pashnev, M. A., E-mail: pashma@ippe.ru and Savostin, V. V. and Shimkevich, A. L.},
abstractNote = {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.},
doi = {10.1134/S1063774507030212},
journal = {Crystallography Reports},
number = 3,
volume = 52,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}