Resonant states of the [sup 4]He liquid-vapor interface

The spectrum of elementary excitations of the [sup 4]He liquid-vapor interface is analyzed at various temperatures on the basis of a Feynman description of the thermal excitations. Phenomenological forms are adopted for the density profile of the interface and the two-body correlations that enter th...

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Bibliographic Details
Published inJournal of low temperature physics Vol. 96:3-4
Main Authors Gernoth, K.A., Clark, J.W.
Format Journal Article
LanguageEnglish
Published United States 01.08.1994
Subjects
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITATION
EXCITED STATES
FLUIDS
GASES
HELIUM 4
HELIUM ISOTOPES
INTERFACES
ISOTOPES
LIGHT NUCLEI
LIQUIDS
NUCLEI
RESONANCE
STABLE ISOTOPES 665430 > Other Topics in Quantum Fluids & Solids > (1992-)
VAPORS
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Summary:The spectrum of elementary excitations of the [sup 4]He liquid-vapor interface is analyzed at various temperatures on the basis of a Feynman description of the thermal excitations. Phenomenological forms are adopted for the density profile of the interface and the two-body correlations that enter this variational treatment. The excited modes may be subdivided into liquid, vapor, vapor-liquid, and bound excitations. It is found that the interface supports resonant states which exhibit a rather large amplitude in the inhomogeneous interface layer separating the bulk liquid and vapor phases. The excitation energies of interface resonances form bands in the excitation spectrum that broaden with increasing temperature. The authors sketch a microscopic model of the decrease of the interface tension with temperature which yields results in good agreement with experiment.
Bibliography:None
ISSN:0022-2291
1573-7357
DOI:10.1007/BF00752403