Abstract
The sticking coefficient of H 2/Ni(111) changes proportionally to the beam energy. The angular distribution of the probability of adsorption varies with cos 3.5θ; the angular distribution of desorption is found to change as cos 4.5θ at 300 K. Assuming validity of detailed balancing, the adsorption data suggest an energy distribution for desorption which agrees with existing time-of-flight measurements.
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