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The Adsorption of H2 and D2 on Fe(110). 2. Angle Resolved Thermal Desorption Spectroscopy and Kinetic Mechanism.
Interim technical rept.,
RENSSELAER POLYTECHNIC INST TROY NY DEPT OF MATERIALS ENGINEERING
Pagination or Media Count:
Results of angle resolved thermal desorption spectroscopy ARTD measurements for the adsorption of Deuterium and Hydrogen on Iron 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. Angle Resolved Thermal Spectroscopy 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. H2 and D2 were found to adsorb directly, dissociatively and with an activation energy of 700 calmole. The sticking coefficient was observed to decrease with increasing coverage.
APPROVED FOR PUBLIC RELEASE