SURFACE ATOMIC-XAFS FOR NITROGEN-ATOMS ON COPPER

The presence of oscillatory structures in the atomic x-ray absorption background is reported for the first time for surface EXAFS of c(2x2)N iCu(100) and (2x3)N/Cu(110). The experimental data for N/Cu(110) are c ompared to FEFF7 calculations of the oscillating atomic background mu( 0)(E). For the two systems it is found that the AXAFS peak in the Four ier transform increases by a factor of two as the N-atom is adsorbed c loser to the surface plane.