Ionization energies of valence levels in physisorbed rare-gas multilayers

This is the authors' abstract. We don't add key points for this paper.

Experimental data by diverse authors show that the ionization energies of valence levels of xenon atoms residing on pure metal surfaces or on top of a thin insulator slab are nearly constant. It is suggested that this independence of the ionization energy of the slab thickness is due to identical final states, brought about by a transfer of the valence-band hole during the photoionization process into the layer of the insulator closest to the metal.