Desorption from LiF(100) by singly- and doubly-charged hyperthermal He ions

T. Neidhart, M. Schmid and P. Varga

Institut für Allgemeine Physik, Technische Universität Wien, A-1040 Wien, Austria

Desorption Induced by Electronic Transitions DIET V
Springer Series in Surface Sciences, Vol. 31, pp. 129-132
Eds. A.R. Burns, E.B. Sechel, D.R. Jennison (Springer-Verlag Berlin Heidelberg 1993)

Sputtering of a LiF(100) surface by singly- and doubly-charged He ions with impact energies between 10 and 500 eV has been performed. The yield of sputtered Li+ and F- ions is only slightly higher for doubly-charged ions compared to singly-charged at impact energies below 100 eV, whereas the F+ yield is substantially increased if doubly-charged projectiles are used. The experimental data are explained within the framework of a model based on calculations by Walkup and Avouris.

Corresponding author: P. Varga (varga< encoded email address >).