Resonant Auger studies of metallic systems

Results of resonant Auger spectroscopy experimental are presented for Cu, C o, and oxidized Al. Sublifetime narrowing of Auger spectra and generation o f sublifetime narrowed absorption spectra constructed from Auger yield meas urements were observed. Resonant Auger yields are used to identify three ch emical states of oxidized Al. Partial absorption yield spectra were derived giving detailed electronic information and thickness information for the v arious chemical states of the bulk metal, the passivating aluminum oxide la yer, and the metal-oxide interface region. In addition, the total absorptio n yield spectrum for the oxidized Al sample was constructed from the partia l yield data, supporting the consistency of our method. (C) 2000 American V acuum Society. [S0734-2101(00)12304-8].