title: Photoelectron imaging spectroscopy of S1(1B2u π,π*) benzene via 6(1)1n (n = 0-3) levels.
abstract: We report resonance-enhanced two-photon ionization photo-electron spectroscopy of jet-cooled benzene via the 6(1)1(n) (n = 0-3) vibronic levels in S(1)((1)B(2u) π,π*) using a nanosecond UV laser and photoelectron imaging. The best energy resolution (ΔE/E) was 0.7%. The photoelectron spectrum from the S(1) 6(1)1(3) level (E(vib) = 3284 cm(-1)) in the channel three region exhibited a clear signature of intramolecular vibrational redistribution (IVR). The spectral features were consistent with picosecond zero kinetic energy photoelectron (ZEKE) spectra reported by Smith et al. [ J. Phys. Chem. 1995, 99, 1768]. The photoelectron angular anisotropy parameter β(2) was found to be negative in ionization from the 6(1)1(n) (n = 0-3) levels with photoelectron kinetic energies up to 5000 cm(-1). No influence of a shape resonance was identified.
authors.affiliation: Chemical Dynamics Laboratory, RIKEN Advanced Science Institute, RIKEN, Wako 351-0198 Japan.
authors.forename: Dongmei
authors.initials: D
authors.lastname: Niu
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Ogi
authors.forename: Yoshi-Ichi
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Toshinori
authors.initials: T
authors.lastname: Suzuki