Abstract
Abstract We report the experimental evidence of the one-photon resonance in the cationic excited state of cyclopentanone using the femtosecond time-resolved pump-probe method. The transients of the parent ion and the C 2 H 4 + fragment exhibit constant depletion in the pump-probe delay time up to 7 ps, however, that of the C 4 H 8 + /C 3 H 4 O + fragment presents formation behavior. By recording dependence of the ion yields as the probe laser intensity, we demonstrate one 400-nm photon resonance in the cationic excited state, which is assigned as the D 4 ( 2 A) cationic state based on the theoretical calculations. Possible dissociation mechanism of the D 4 state is also discussed.
Published Version
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