ION NEUTRALIZATION AT THE SURFACE OF A CONTAMINATED COMPOSITE SYSTEM

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on neutralization near the surface of a supported metal system is stuided within the framework of the approximate many-level method. The tight-binding approximation is employed to model the composite system and impurity is described by the Koster-Slater model. Calculations show that the metal thickness plays important role in the resonance-charge-transfer process and the ion occupancy depends strongly on the impurity site and orbital energy.