Influence of retardation on the vibrational wave function and binding energy of the helium dimer

Because of the extremely small binding energy of the helium dimer, the nuclear wave function is delocalized over an extremely large range of separations. One might therefore expect the properties of this extraordinary species to be sensitive to the potential at very large internuclear distances, r,...

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Veröffentlicht in:The Journal of chemical physics 1993-06, Vol.98 (12), p.9687-9690
Hauptverfasser: FEI LUO, GEUNSIK KIM, MCBANE, G. C, GIESE, C. F, GENTRY, W. R
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Sprache:eng
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Zusammenfassung:Because of the extremely small binding energy of the helium dimer, the nuclear wave function is delocalized over an extremely large range of separations. One might therefore expect the properties of this extraordinary species to be sensitive to the potential at very large internuclear distances, r, where relativistic corrections to the usual van der Waals interaction may be important. We have estimated the effect of retardation, which changes the r−6 dependence of the potential to r−7 in the limit of large r, and have found that the binding energy and expectation value 〈r〉 are indeed significantly affected by its inclusion.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.464347