Measurements of the reflection, adsorption, and desorption of gases from smooth metal surfaces

Abstract

The scattering of thermal energy beams of 4He, H2, and D2 from the (111) surfaces of epitaxially grown Ni and Ag single crystals has been measured. Also measured were the angular dependences of the desorption of HD resulting from the dissociation-recombination exchange reaction of H2 and D2 on active (111) Ni surfaces. The angular desorption dependence of HD is contrary to the Knudsen law and is describable analytically by cosdθr where 2.5