OBSERVATION OF PROPAGATING COLLECTIVE EXCITATIONS IN LIQUID SO2

被引：8
作者：
BERMEJO, FJ
MARTINEZ, JL
MARTIN, D
GARCIAHERNANDEZ, M
MOMPEAN, FJ
ALONSO, J
机构：
[1] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE
[2] RUTHERFORD APPLETON LAB,ISIS,PULSED NEUTRON FACIL,DIDCOT OX11 0QX,OXON,ENGLAND
来源：
JOURNAL OF CHEMICAL PHYSICS | 1991年 / 95卷 / 07期
关键词：
D O I：
10.1063/1.461654
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The spectrum of collective excitations in liquid sulphur dioxide at two thermodynamic states has been measured by neutron triple-axis spectroscopy for momentum transfer ranges of 0.35 less-than-or-equal-to Q less-than-or-equal-to 2.0 angstrom -1. Well-resolved inelastic peaks indicating the presence of propagating modes are found for Q values below 0.5 angstrom -1 at T = 266 K and below 0.7 angstrom -1 at T = 210 K. A precise value for the hydrodynamic limit has been found in both cases and the measured "dispersion relations" are discussed in relation to predictions made by recent theoretical approaches.
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页码：5387 / 5391
页数：5
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