Abstract
Results of angle resolved thermal desorption spectroscopy (ARTDS) measurements for the adsorption of D 2 and H 2 on Fe(110) are presented. A detailed model of the interaction process has been developed using these results in combination with results obtained using thermal energy atom scattering (TEAS), reported in part I of this work, ARTDS was used to measure the desorption flux as a function of surface polar angle during temperature programming following adsorption at a low temperature. Second order desorption kinetics, as observed with TEAS in part I, were confirmed. H 2 and D 2 were found to adsorb directly, dissociatively and with an activation energy for adsorption of 700 cal/mol. The sticking coefficient was observed to decrease with increasing coverage as (1− θ) 2 for θ greater than 0.1.
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