Abstract
The quantum theory of gettering (the removal of a gas from a closed vessel by adsorbing it on a solid) has been used to compute sticking coefficients of H and D, with energies in the range 0–80 meV, on a model metal with energy loss to electron-hole pairs. Two aspects of the results are exhibited: many-body effects in the case of H and the isotope effect. Regarding the former, many-body effects are important but not crucial, and, in particular, they do not affect the sticking coefficient in the gas atom zero-energy limit. Regarding the latter, quantum effects in the motions of the gas atoms near the surface govern the isotope effect.
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