[Zurück]

W. Meissl, J. Stöckl, M Fürsatz, Hp. Winter, F. Aumayr, J.R. Crespo López-Urrutia, J. Simonet, W. Chen, H. Tawara, J. Ullrich:
"Interaction of slow multiply charged ions with insulator surfaces";
in: "Photonic, Electronic and Atomic Collisions", P. Fainstein, M. Lima, J.E. Miraglia, E. Montenegro, R. Rivarola (Hrg.); herausgegeben von: Proceedings of the XXIV International Conference; World Scientific, 2006, ISBN: 981-270-412-4, S. 633 - 640.

We have investigated electron emission for impact of slow multiply charged ions on an atomically clean and flat insulating LiF(001) surface. For grazing scattering of Arq+ projectiles from LiF time-of- flight spectra and the number of emitted electrons have been determined in coincidence. By relating projectile energy loss to kinetic electron emission we were able to determine contributions from potential electron emission even in the presence of a considerable number of kinetically excited electrons. Furthermore, in non-coincident measurements with Xe ions in charge states up to 52+ we compare potential electron emission from a conducting Au(111) and an insulating LiF(001) single-crystal target at different impact velocities and ion impact angles. Preliminary results suggest that for normal incident very highly charged ions electron emission from LiF is obstructed by the finite hole mobility.