Sticking Probability ofH2and HD on Noble-Metal Surfaces

Abstract
One-phonon distorted-wave Born-approximation calculations of the energy-dependent phonon-assisted sticking probabilities of H2 and HD at smooth metal surfaces yield peaks as a function of incident energy due to rotationally mediated selective-adsorption resonances. These peaks are weak for H2, but are strong (and observable) for HD because the asymmetry of the molecule causes stronger translational-rotational coupling.