Publications in Scientific Journals:
H. Winter, S. Lederer, Hp. Winter:
"Fermi momentum above metal surface from electrons ejected by impact of He atoms";
Kinetic emission (KE) of electrons near its threshold is studied for grazing impact
of keV He atoms on flat and clean Al(111), Al(110), and Cu(111) surfaces. We observe a defined
dependence of the KE threshold behaviour on the scattering conditions. The data are analyzed
in the framework of a classical model for electron emission based on momentum transfer in
binary encounters between atomic projectiles and conduction electrons of the metal target.
From the impact velocity dependence of KE yields near threshold we obtain information on
momenta of Fermi electrons as a function of distance from the surface and on the corresponding
electronic surface potential.
Online library catalogue of the TU Vienna:
Created from the Publication Database of the Vienna University of Technology.