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Lifetime of the benzene dimer in the S2 electronic state

✍ Scribed by W. Radloff; Th. Freudenberg; H.-H. Ritze; V. Stert; F. Noack; I.V. Hertel

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 480 KB
Volume: 261
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(96)00972-4

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✦ Synopsis

The lifetime of the benzene dimer in the S 2 state has been determined directly by pump-probe measurements with 160 fs laser pulses. The value of = 40 fs obtained characterises the fast internal conversion to the S O as well as to the S ~ state. The probability of the S 2 to S~ state conversion for the dimer is small but significant and a factor of about 2 larger than that for the benzene monomer. These results explain in a direct manner corresponding experiments with ns laser pulses where two-photon enhancement of the ion yield is observed only when the second photon has sufficient energy to ionise the S 1 state.

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