The interaction of helium with smooth metal surfaces

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Abstract
The physisorption properties of helium interacting with a series of free-electron-like and noble metals are examined. The approach used is that of Zaremba and Kohn (1977), but the theory is extended to include the departure from asymptotic behaviour of the metal wavefunction tails in the selvedge, the proper placement of the ionic background edge and corrections to the asymptotic van der Waals interaction. Calculated binding energies are lower than those reported by Zaremba and Kohn by 20-30%.