PHOTOEMISSION AND ION-SCATTERING STUDY OF CE NI(110) AND CE/CU(110) SYSTEMS/

We have studied the electronic structures of Ce/Ni(110) and Ce/Cu(110) systems by the 4d-->4f resonant photoemission using synchrotron radia tion and the Ce 3d core-level x-ray photoemission. We also investigate d the distribution of component atoms in surface layers of Ce/Ni(110) system by the medium-energy ion scattering. In Ce/Ni(110) system, stre ngth of the hybridization between 4f and conduction electrons (f-c hyb ridization) significantly depends on the Ce concentration in the surfa ce layers. In Ce/Cu(110) system, the f-c hybridization is very weak an d insensitive to the Ce concentration in the surface layers.