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MO: Molekülphysik
MO 42: Excitation and Coherence Decay
MO 42.2: Talk
Wednesday, March 15, 2006, 14:15–14:30, H12
Femtosecond time resolved Experiments on the t-Butyl Radical — •Bastian Noller1, Lionel Poisson2, Raman Maksimenka1 und Ingo Fischer1 — 1Institut für Physikalische Chemie, Universität Würzburg, Am Hubland D-97074 — 2CEA Sacley, Bâtiment 522, 91191 Gif sur Yvette
The photophysics of the 3s and 3p state of the t-Butyl radical, C4H9, were investigated by femtosecond time resolved pump probe experiments in the gas phase. The radicals were produced by flash pyrolysis of Azo-t-butane. Three detection methods were used to elucidate the dynamics of the radical: Time of flight mass spectroscopy, photoion imaging and photoelectron imaging. Interestingly the lifetime of the 3 2A1 (3p) state at 255 nm is longer than the lifetime of the lower lying 2 2A1 (3s) state at 330 nm (1.9 ps vs. 110 fs).