论文信息 - Internal conversion in highly excited benzene and benzene dimer: femtosecond time-resolved photoelectron spectroscopy

Internal conversion in highly excited benzene and benzene dimer: femtosecond time-resolved photoelectron spectroscopy

Abstract Photoelectron spectra of benzene molecules and dimers excited to the S2 electronic state by 140 fs laser pulses at a wavelength of 200 nm have been measured by combining the pump–probe technique with the coincidence detection of ions and electrons. Their time dependence allows one to directly follow the evolution of internal conversion processes in different electronic states on a fs time-scale. Analysis of the corresponding electron energy distribution reveals large variations in the geometry of the different electronic states in both benzene and in its dimer.

[1] H. Krause,et al. Dissociation of state-selected complex ions studied by mass-selective pulsed field threshold ionization spectroscopy , 1992 .

[2] W. Domcke,et al. Ab initio investigation of potential‐energy surfaces involved in the photophysics of benzene and pyrazine , 1993 .

[3] E. Riedle,et al. Sub-Doppler high-resolution spectra of benzene: anomalous results in the "channel three" region , 1983 .

[4] Ian J. Palmer,et al. An MC-SCF Study of the S1 and S2 Photochemical Reactions of Benzene , 1993 .

[5] Edward W. Schlag,et al. Multiphoton mass spectrometry of clusters: dissociation kinetics of the benzene cluster ions , 1988 .

[6] F. Zerbetto,et al. Resonance Raman spectroscopy of the B1u region of benzene: Analysis in terms of pseudo‐Jahn–Teller distortion , 1992 .

[7] H. Krause,et al. Binding energies of small benzene clusters , 1991 .

[8] V. Stert,et al. Femtosecond dynamics of benzene(NH3)n complexes in highly excited states , 1995 .

[9] M. Vervloet,et al. Ionic substitution reaction in small dihalogenated benzene-(NH3)n clusters studied through threshold photoelectron-photoion coincidences , 1995 .

[10] I. Hertel,et al. Lifetime of the benzene dimer in the S2 electronic state , 1996 .

[11] C. Hayden,et al. Femtosecond time-resolved photoionization and photoelectron spectroscopy studies of ultrafast internal conversion in 1,3,5-hexatriene , 1996 .