Abstract
We have measured absolute total electron emission yields for impact of carbon cluster ions on atomically clean gold, as a function of cluster size (up to ), charge (up to ), and kinetic energy (up to 165 keV). Besides a linear dependence on cluster size and occurrence of electron emission well below the classical kinetic emission threshold, we find no dependence on the fullerene charge, and thus a suppression of potential electron emission. This is in contrast to the interaction of multicharged atomic ions with surfaces. We present molecular-dynamics calculations which provide evidence of fast quenching of the primary excitation energy via fragmentation of the projectiles.
- Received 2 January 1997
DOI:https://doi.org/10.1103/PhysRevA.56.3007
©1997 American Physical Society