title: Angular studies of potential electron emission in the interaction of slow ions with Al surfaces
abstract: We report energy distributions of electrons emitted from Al surfaces under impact by 1 keV Ar+ and 1-5 keV Ne+ ions. The variation of the energy distributions with the angle of incidence is different for both ions and provides information on the mechanism responsible for electron emission. For Ar+ electron emission results mainly from Auger neutralization, while for Ne+ an important emission mechanism is the decay of plasmon excitations. We find a transition between surface and bulk plasmon excitations as the energy of the ion is increased.
authors.affiliation: Laboratorio IIS, Dipartimento di Fisica, Universita della Calabria, and INFM Unita di Cosenza, 87036 Arcavacata di Rende, Cosenza, Italy.
authors.initials: P
authors.lastname: Riccardi
authors.initials: P
authors.lastname: Barone
authors.initials: A
authors.lastname: Bonanno
authors.initials: A
authors.lastname: Oliva
authors.initials: RA
authors.lastname: Baragiola