Resonant electron capture byC60ions at a metal surface with projected band gap

Abstract

${\text{C}}_{60}^{+}$ and ${\text{C}}_{60}^{2+}$ ions are scattered under grazing incidence from an atomically clean and flat Be(0001) surface at kilo-electron-volt energies. Distances for electron transfer are deduced from shifts of angular distributions for incident ${\text{C}}_{60}^{+}$ and ${\text{C}}_{60}^{2+}$ projectiles, which reflect changes in the interaction potentials at the instants of electron transfers. These distances are consistent with classical over-the-barrier model results indicating that the suppression of charge transfer, observed for atomic projectiles in front of metal surfaces with a projected band gap, is absent for fullerenes.