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Author Barranco, M. ♦ Hernandez, E. S. ♦ Navarro, J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ HELIUM 3 ♦ ZERO SOUND ♦ PHASE TRANSFORMATIONS ♦ LIQUIDS ♦ TEMPERATURE DEPENDENCE ♦ TEMPERATURE ZERO K ♦ TEMPERATURE RANGE 0000-0013 K ♦ EFFECTIVE MASS ♦ SPIN WAVES ♦ ATOMIC CLUSTERS ♦ CORRELATED-PARTICLE MODELS ♦ LENNARD-JONES POTENTIAL ♦ INTERACTION RANGE
Abstract The random-phase-approximation (RPA) dynamical response of liquid {sup 3}He at finite temperatures has been calculated using an effective density-dependent atom-atom interaction. The interaction contains a zero-range part of Skyrme type, supplemented by a weighted density approximation to account for short-range correlations, and a long-range effective interaction of Lennard-Jones type. The calculated zero-sound and paramagnon energy centroids agree reasonably with data, and the calculated strength exhibits a negative energy tail extending up to {minus}0.5 meV, also in good agreement with existing data. We have found that opposite to what happens with zero sound, within RPA the paramagnon peak is rather insensitive to thermal broadening. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-09-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 10


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