CORE-VALENCE AUGER-SPECTRA OF LIAL ZINTL INTERMETALLIC COMPOUND

The core-valence-valence Auger spectra were measured for a nearly stoi chiometric polycrystalline LiAl intermetallic compound. These spectra were compared with the self-convolution of die density-of-state curves obtained from theoretical band structure calculations. Major discrepa ncies between the experimental data and this simple one-particle model prompt a more elaborate treatment to include many-body and core-hold relaxation effects. Significant accumulation of lithium was observed a t the surface of the ''as-fractured'' sample. Ion bombardment resulted in lithium removal from the damaged surface layer, as opposed to elec tron bombardment which caused surface segregation of lithium originati ng from the bulk.