Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

SYCF: Symposium Cluster und Fullerene

SYCF 8: Fullerene und Nanotubes

SYCF 8.1: Vortrag

Donnerstag, 18. März 1999, 16:30–16:45, MP1

Final results for the C60 binding energy — •Sara Matt¹, Olof Echt², Martin Sonderegger¹, Rainer David¹, Paul Scheier¹, Julia Laskin³, Chava Lifshitz⁴, and Tilmann Märk¹ — ¹Institut fuer Ionenphysik, Universitaet Innsbruck, 6020 Innsbruck, Oesterreich — ²Department of Physics, University of New Hampshire, Durham NH 03824, USA — ³Department of Chemistry and Biochemistry, University of Delaware, Newark DE 19716, USA — ⁴Department of Physical Chemistry and The Farkas Center for Light Induced Processes, The Hebrew University of Jerusalem, Jerusalem 91904, Israel

We have used the two field free regions of a two sector field mass spectrometer (reversed geometry) to determine the time dependence of the metastable fractions for the decay C60+ in C58+ and C2 and C58+ in C56+ and C2 and from the best fit to this data we deduced the Gspann parameter, which is appropriate for our experimental set up. In order to determine the C60 binding energy we need in addition to the Gspann parameter the heat bath temperature, that is the temperature to which a heat bath must be set to yield the same decay rate, which can be extracted from a fit to measured kinetic energy release distributions (KERD) of the corresponding decay reaction. The KERDs have been determined by calculating the first derivative of the measured MIKE fragment ion peak shape. The results we obtained for singly, doubly and triply charged C60 ions are in excellent agreement with other recently published values.