Alkali dimers on the surface of liquid helium

Peter B. Lerner, Milton Walter Cole, E. Cheng

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A recent paper by Ancilotto et al. (Zeitschrift für Physik B, in press), presented calculations of adsorption energies and the geometry of a surface dimple for alkali atoms bound to the surfaces of quantum liquids (4He,3He, H2). Here we present a study of the adsorption of two alkali dimers (Li2, Na2) on the surface of liquid helium. The calculations employ a model of an abrupt interface formulated by Ancilotto et al. as well as one using a diffuse interface. Our conclusion its that the dimers are bound to the surface more strongly than their respective monomers. In the case of dimers there is an additional degree of freedom-the orientation of the molecular axis relative to the surface. We study the influence of molecular anisotropy on adsorption by comparing the cases of "erect" and "spinning flat" orientations and conclude that the latter is energetically favored.

Original languageEnglish (US)
Pages (from-to)501-514
Number of pages14
JournalJournal of Low Temperature Physics
Volume100
Issue number5-6
DOIs
StatePublished - Sep 1 1995

Fingerprint

Helium
Alkalies
liquid helium
Dimers
alkalies
dimers
Liquids
Adsorption
adsorption
metal spinning
Anisotropy
monomers
degrees of freedom
Monomers
Atoms
anisotropy
Geometry
liquids
geometry
atoms

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Lerner, Peter B. ; Cole, Milton Walter ; Cheng, E. / Alkali dimers on the surface of liquid helium. In: Journal of Low Temperature Physics. 1995 ; Vol. 100, No. 5-6. pp. 501-514.
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Lerner, PB, Cole, MW & Cheng, E 1995, 'Alkali dimers on the surface of liquid helium', Journal of Low Temperature Physics, vol. 100, no. 5-6, pp. 501-514. https://doi.org/10.1007/BF00751522

Alkali dimers on the surface of liquid helium. / Lerner, Peter B.; Cole, Milton Walter; Cheng, E.

In: Journal of Low Temperature Physics, Vol. 100, No. 5-6, 01.09.1995, p. 501-514.

Research output: Contribution to journalArticle

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AU - Lerner, Peter B.

AU - Cole, Milton Walter

AU - Cheng, E.

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AB - A recent paper by Ancilotto et al. (Zeitschrift für Physik B, in press), presented calculations of adsorption energies and the geometry of a surface dimple for alkali atoms bound to the surfaces of quantum liquids (4He,3He, H2). Here we present a study of the adsorption of two alkali dimers (Li2, Na2) on the surface of liquid helium. The calculations employ a model of an abrupt interface formulated by Ancilotto et al. as well as one using a diffuse interface. Our conclusion its that the dimers are bound to the surface more strongly than their respective monomers. In the case of dimers there is an additional degree of freedom-the orientation of the molecular axis relative to the surface. We study the influence of molecular anisotropy on adsorption by comparing the cases of "erect" and "spinning flat" orientations and conclude that the latter is energetically favored.

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