SURFACE AUGER ENERGY SHIFTS IN BCC TRANSITION-METALS

We calculate the Surface Auger Energy Shifts at the (110) surface of B CC transition metals. We use the equivalent core approximation, which reduces this problem to the computation of the Surface Segregation Ene rgy of [Z + 2] and [Z + 1] impurities in a crystal of atomic number Z. The calculations are carried out in the framework of the tight-bindin g approximation. General trends are derived and compared with those of single core hole surface binding energy shifts. (C) 1997 Elsevier Sci ence Ltd.