Calculation of H(1s) angular distributions for H{sup +} impinging on Al(111) at grazing incidence

We have computed angular distributions of scattered ground-state hydrogen atoms after interaction of $49$-, $25$-, $6.25$-, and $1$-keV proton beams with an Al($111$) surface under a grazing angle of incidence of $0.56$${}^{\ifmmode^\circ\else\textdegree\fi{}}$. Capture and loss for resonant and Auger processes are taken into account, as well as the surface-plasmon-assisted electron-capture mechanism. Consideration of all these processes makes it possible to obtain a good agreement with the available experimental result at $25$ keV ($v=1$ a.u.). For the other impact energies considered, our predictive results have to be compared to measurements; such comparisons could make it possible to discriminate between the various theoretical results available in the literature for the resonant process which are used in the present dynamical calculations.