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ID 21453
file
creator
Hosokawa, S.
Kajihara, Y.
Matsuda, K.
Tsutsui, S.
Baron, A. Q. R.
NDC
Physics
abstract
The dynamic structure factor of molten CsCl has been measured at low momentum transfer, 1.4 nm(-1) <= Q < 33 nm(-1), using high-resolution inelastic x-ray scattering. The longitudinal acoustic mode disperses 1.7 times faster than the adiabatic sound velocity and its linewidth increases following the Q(2) law as predicted by the hydrodynamics. However, the linewidth is a factor of seven smaller than the estimation using the linewidths obtained from Brillouin light scattering. The large speed-up and the significant narrowing of the collective mode, which can be related to each other by a recently presented viscoelastic theory, must arise from the intrinsic nature of molten alkali chlorides. Furthermore in comparison with the previous results for molten NaCl and KCl, the apparent sound velocity is found to be approximately scaled by the inverse of the square-root of the effective mass among these molten salts.
journal title
Journal of Physics-Condensed Matter
volume
Volume 19
issue
Issue 46
start page
466110
date of issued
2007-11
publisher
IOP Publishing Ltd
issn
0953-8984
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright(c) 2007 IOP Publishing Ltd
relation is version of URL
http://dx.doi.org/10.1088/0953-8984/19/46/466110
department
Graduate School of Integrated Arts and Sciences