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Magnetic Field Dependence of Molecular Quantum Beat: Biacetyl

W. Henke, H. L. Selzle, T. R. Hays, and E. W. Schlag
Institut für Physikalische Chemie der Technischen Universität München,
Garching
Z. Naturforsch. 35a, 1271-1272 (1980);

[received October 17 1980]

The effect of an external magnetic field on the decay of an excited single rotational state of the l A u electronic state of biacetyl is observed in a hypersonic jet experiment after narrow bandwidth laser excitation- The lifetime of the excited state decreases already at low magnetic fields and the molecular quantum beat vanishes.

Biacetyl at room temperature shows a broad