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Bonn 2000 – scientific programme

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MO: Molekülphysik

MO 15: Poster I: Cluster und Fullerene

MO 15.13: Poster

Wednesday, April 5, 2000, 10:30–13:00, Aula

Electronic gas phase spectra of linear C4 and C5 — •Harold Linnartz1, Tomasz Motylewski1, Olga Vaizert1, Thomas Giesen2, and John P. Maier11Institute for Physical Chemistry, Klingelbergstrasse 80, CH-4056 Basel — 2I. Physikalisches Institut, Universität Köln, Zülpicher Str. 77, D-50937 Köln

The electronic origin band spectrum of the 3Σu3Σg transition of C4 and the 1Πu ← X1Σg+ transition of C5 [1] have been recorded in the gas phase, using cavity ring down spectroscopy in a supersonic planar plasma [2]. An uniform plasma is generated both by discharge and ablation techniques. Whereas the C5 band is heavily broadened, the C4 spectrum clearly shows rotational structure. Besides the origin band transitions additional transitions to vibrationally excited levels in the upper electronic state are reported as well.

[1] J. Chem. Phys. 111, 6161 (1999)

[2] Rev. Sci. Instrum. 70, 1305 (1999)

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