[Back]

H. Winter, K. Maass, S. Lederer, Hp. Winter, F. Aumayr:
"Kinetic electron emission for planar versus axial surface channeling of He atoms and ions";
Physical Review B, 69 (2004), 054110-1 - 054110-4.

Fast He1 ions and He° atoms are scattered under grazing incidence from a clean and flat Al~111! surface.
The target current recorded as function of azimuthal angle with respect to the surface orientation is enhanced
for scattering along low-index crystallographic directions. Coincident studies on the number of electrons
emitted per ion impact allow us to explore this effect. We find that the increase of the total electron yield for
surface channeling along low-index directions stems primarily from projectiles with trajectories in the subsurface
region and the consequent emission of a substantially larger number of electrons.
DOI: 10.1103/PhysRevB.69.054110 PACS number~s!: 79.20.Rf, 61.85.1p, 79.60.Bm