| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1687819 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2007 | 6 Pages |
He+ ions and He0 atoms with keV energies are scattered under a grazing angle of incidence from an Al(1 1 1) surface. Fractions of surviving ions and energy gains of ions prior to neutralization are derived from charge state distributions for scattered projectiles and shifts of angular distributions for impact of charged and neutral projectiles. By comparing the experimental data with theoretical predictions for the interaction potential, the neutralization rate, and the He 1s level shift we reveal deficiencies of the present theoretical understanding for the interaction of He atoms and ions with Al(1 1 1), a “model system” for the study of atom–surface interactions. We demonstrate that our data is very sensitive on interaction potentials, the (Auger) neutralization rate, and the He 1s level shift. Our work provides important experimental input for in-depth tests of theoretical models for the interaction of He atoms and ions with Al(1 1 1).
