PAIR POTENTIALS IN THE SEXAFS ANALYSIS

An overview for a dynamical SEXAFS analysis for several systems is pre sented in terms of effective pair potentials. Model potentials of Made lung type are found to describe well the adsorption of N, O, O-2 on Cu and Ni metal surfaces. The potential parameters are discussed in rela tionship to the electronic nature of the adsorbate substrate bond and the occurrence of surface reconstructions. A comparison with S adsorpt ion is given with data taken from the literature.