Original scientific paper

Attractive potentials for helium atoms at intermediate distances from the metal surface the role of the atomic matrix elements

Bojana Trninić Radja ; Department of Physics, Faculty of Science, P. 0. B. 162, 41001 Zagreb, Croatia, Yugoslavia
Marijan Šunjić ; Department of Physics, Faculty of Science, P. 0. B. 162, 41001 Zagreb, Croatia, Yugoslavia
Zlatko Penzar ; Institute of Physics of the University, P. 0. B. 304. 41001 Zagreb, Croatia, Yugoslavia

Abstract

Attractive electrostatic potential between a helium atom and the jellium surface is studied using the non-local dynamically screened Coulomb interaction which describes the electronic (single particle and collective) fluctuations in the metal. It is shown that the detailed form of the atomic matrix elements and the higher multipole contributions lead to the strong modification of the van der Waals attraction even when one neglects the dispersion and damping of the electronic excitations in the metal. Therefore it becomes necessary to treat both the atomic and the metallic effects within the same accuracy.

Keywords

Hrčak ID:

329105

URI

https://hrcak.srce.hr/329105

Publication date:

7.5.1984.

Article data in other languages: croatian

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