Atom Abstraction in the Scattering of State-Selected ${\mathrm{NO}}^{+}\left({\mathit{X}}^1{\mathit{\Sigma }}^{+}\right)$ on O/Al(111)

The reactive scattering of state-selected ${\mathrm{NO}}^{+}\left(X^1{\Sigma }^{+}\right)$ on oxygen-covered Al(111) is explored at hyperthermal collision energies. Relative ion yields and mean translational energies of scattered ${\mathrm{NO}}_2^{-}$ are presented as a function of oxygen exposure and ${\mathrm{NO}}^{+}$ collision energy. Above the $9\pm 1\mathrm{eV}$ threshold for reaction, ${\mathrm{NO}}_2^{-}$ products emerge with an average kinetic energy that depends linearly on incident ${\mathrm{NO}}^{+}$ energy. The formation of ${\mathrm{NO}}_2^{-}$ is assigned to the direct, Eley-Rideal abstraction of an adsorbed O atom by an incident NO molecule.