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MO: Molekülphysik
MO 17: Fullerene (gemeinsam mit FV Atomphysik)
MO 17.1: Vortrag
Donnerstag, 6. April 2000, 14:00–14:15, HS VIII
Fragmentation in Fullerene-Fullerene Collisions — •Frank Rohmund, Alexei V. Glotov, and Eleanor E.B. Campbell — School of Physics and Engineering Physics, Gothenburg University and Chalmers University of Technology, S-412 96 Gothenburg, Sweden
Fragmentation in collisions between fullerenes was studied as a function of scattering angle and collision energy employing a rotatable reflectron time-of-flight mass spectrometer. Three fragmentation channels are simultaneously observed: Evaporation of C2-units from a hot fusion compound, breakup of the fusion compound and direct fragmentation of the projectile. The fullerene-like fusion-evaporation products are detected only in a narrow range of angles around the direction of the primary ion beam, due to the statistical nature of the evaporation process. The breakup fragments are small carbon clusters which could be detected by using a post-acceleration technique. They are characterised by a mass-independent velocity distribution. The direct fragmentation products show a much broader angular distribution than ions originating from fusion events, having masses between 58 and 15 carbon atoms.