XE MONOLAYER ADSORPTION ON CU(110) - EXPERIMENTS AND INTERACTION CALCULATIONS

The isosteric heat of adsorption, the lateral energy, the frequency of the perpendicular monolayer vibrational mode and the sequential occurrence of metastable high order commensurate structures for the Xe monolayer adsorbed on the Cu(110) surface have been determined using helium atom scattering experiments. The same quantities are then calculated on the basis of simple expressions of semi-empirical interaction potentials and the pertinency of such expressions in describing the whole body of experimental data is discussed. It is shown that a fair agreement can be obtained in a first approximation with potentials exhibiting a minimum of three parameters.