Abstract
We report the relative efficacy of vibrational and translational energy in overcoming the barrier to dissociative adsorption of on a Cu(111) surface. This is determined by measuring variation of adsorption probability with kinetic energies, , and vibrational temperature. At the highest energy (=0.83 eV) adsorption is predominantly due to ground-state ; molecules in excited vibrational states play the dominant role for below ∼0.5 eV. A detailed analysis provides estimated adsorption probability versus energy functions for in vibrational states v=0 to v=3.
- Received 23 August 1991
DOI:https://doi.org/10.1103/PhysRevLett.68.1164
©1992 American Physical Society