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MO: Molekülphysik

MO 13: Molecular Clusters I

MO 13.5: Vortrag

Montag, 13. März 2006, 15:00–15:15, H10

Pump-Probe-Photoelectron-Spectroscopy of C₆₀⁻ — •Christine Wehrstein, Raphael Kuhnen, Abdollah Malakzadeh, Pascal Didier, and Bernd v. Issendorff — Physikalisches Institut, Universität Freiburg, Stefan-Meier-Str. 21, 79104 Freiburg

The electronic valence structure of fullerenes is determined by the delocalized π-band which can be seen as a spherical two-dimensional electron gas. This makes fullerenes interesting model systems for the study of relaxation processes in a highly correlated many-electron systems.

C₆₀⁻ clusters have been studied by femtosecond laser photoelectron spectroscopy, measuring intensity dependencies for single pulse excitation with 266nm, 400nm and 800nm light as well as two colour pump-probe-spectra. In the single pulse spectra structures are observed which can be identified as resonant multiphoton detachment of C₆₀⁻. The corresponding intermediate excited states exhibit strongly different decay times.