Resonant charge transfer in grazing scattering of alkali-metal ions from an Al(111) surface

The nonperturbative coupled-angular-mode (CAM) method is applied to the treatment of the parallel velocity-assisted charge-transfer process in grazing scattering of alkali-metal ions at Al(111) surface. The neutralization of ${\mathrm{Na}}^{+}$, ${\mathrm{K}}^{+}$, and ${\mathrm{Li}}^{+}$ projectiles is studied. A multistate treatment of the problem including projectile ground and excited states is performed. Calculated neutral fractions in the scattered beam agree on a quantitative level with available experimental results over a wide range of scattering conditions. The role of the population of excited states is discussed. © 1996 The American Physical Society.