Abstract
The deexcitation of the 6 1 level of the 1B 2u state of the benzene molecule after pulsed laser excitation has been studied. The values obtained for the level lifetime and self-quenching cross section are 89.2 ± 1.8 ns and 12.6 ± 1.4 Å 2. The quenching cross sections for collisions with Ne, Ar, CH 4, NH 3, CO, CO 2 and O 2 have been measured. For the first four colliders no previous data have been reported in the literature. The corresponding results for total quenching cross sections are 0.9±0.1, 3.4±0.3, 7.9±0.6, 22.0±1.0, 6.7±0.5, 13.0±0.8 and 41.0±1.5 Å 2, respectively. The contribution of electronic quenching to these values has been studied.
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