INVESTIGATIONS OF THE BAND TRANSITIONS IN RUTHENIUM (0001)

Inelastic low energy electron diffraction (ILEED) effects have been fo und in electron energy loss spectroscopy (EELS) of the ruthenium (0001 ) surface. in the experiment a cylindrical mirror analyzer (CMA) has b een used. The EEL spectra were measured as a function of the primary e lectron energy E for E < 100 eV. The energy losses within 10 eV from t he elastic peak were studied. Disregarding the electron-phonon interac tion the losses are due to the electron-electron interaction in this r egion. Thus, observed loss peaks have been discussed taking into accou nt band transitions in a ruthenium crystal