Electron-Transfer Pathways in Dynamic Processes:Cl2on K

Detailed observation and analysis of exoelectron emission from velocity-selected ${\mathrm{Cl}}_2$ molecules impinging on a K surface imply a reaction pathway, where surface harpooning, surface-modified electron affinities, molecular dissociation dynamics, and Auger neutralization are key ingredients. To account for the data, a model proposed by Nørskov, Newns, and Lundqvist is extended to include the nonadiabatic electron affinity of ${\mathrm{Cl}}_2$ and an explicit treatment of the ${\mathrm{Cl}}_2$ dissociation trajectories for different incident orientations.