title: Infrared vacuum-ultraviolet laser pulsed field ionization-photoelectron study of CH3Br+ (X(2)E(3/2)).
abstract: By preparing methyl bromide (CH3Br) in selected rotational levels of the CH3Br(X(1)A1; v1 = 1) state with infrared (IR) laser excitation prior to vacuum-ultraviolet (VUV) laser pulsed field ionization-photoelectron (PFI-PE) measurements, we have observed rotationally resolved photoionization transitions to the CH3Br(+)(X(2)E(3/2); v1(+) = 1) state, where v1 and v1(+) are the symmetric C-H stretching vibrational mode for the neutral and cation, respectively. The VUV-PFI-PE origin band for CH3Br(+)(X(2)E(3/2)) has also been measured. The simulation of these IR-VUV-PFI-PE and VUV-PFI-PE spectra have allowed the determination of the v1(+) vibrational frequency (2901.8 +/- 0.5 cm(-1)) and the ionization energies of the origin band (85 028.3 +/- 0.5 cm(-1)) and the v1(+) = 1 <-- v1 = 1 band (84 957.9 +/- 0.5 cm(-1)).
authors.affiliation: Department of Chemistry, University of California, Davis, Davis, California 95616, USA.
authors.forename: X
authors.initials: X
authors.lastname: Xing
authors.forename: P
authors.initials: P
authors.lastname: Wang
authors.forename: B
authors.initials: B
authors.lastname: Reed
authors.forename: S-J
authors.initials: SJ
authors.lastname: Baek
authors.forename: C Y
authors.initials: CY
authors.lastname: Ng