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Publication
Physical Review Letters
Paper
Dynamics of the direct reaction of hydrogen atoms adsorbed on Cu(111) with hydrogen atoms incident from the gas phase
Abstract
Fast HD molecules are observed in the reaction of a beam of H(D) aotms with D(H) atoms chemisorbed on a Cu(111) surface at 100 K. The mean kinetic energy of these molecules is close to 1 eV, or about half of that available. Angular distributions of the nascent HD product are relatively sharp, are displaced slightly away from the surface normal in the specular direction, and display a small sensitivity to the incidence energy. Both the energy and angular distributions are different for D on H and H on D. Results are discussed in terms of a direct Eley-Rideal mechanism. © 1992 The American Physical Society.