DISSOCIATION OF C-60(+) IONS IN COLLISION WITH A NI(100) SURFACE

Collisions of C60+ ions with clean and oxygen-covered Ni(100) surfaces have been studied under UHV conditions. We observed that in contrast to scattering from oriented graphite (HOPG) and diamond (111) Buckmins ter fullerene ions are not stable against collisions with a Ni(100) su rface. AES and LEED measurements show a complete dissociation of the C 60+ at this surface forming a c(2 x 2)C-p4g superstructure. Broad LEED extra spots, even for coverages below 0.33, are discussed to be the r esult of domain formation due to the peculiarities of such a kind of c arbon deposition.