title: Crossed-beam scattering studies of electron-transfer processes between the dication CO2(2+) and neutral CO2: electronic states of reactants and products involved.
abstract: Crossed-beam scattering experiments were carried out at collision energies of 4.51 and 2.71 eV to elucidate the electronic states involved in the nondissociative and dissociative electron-transfer reactions observed following CO(2)(2+)/CO(2) collisions. Specifically, we focus on the observation that, in the dissociative electron-transfer reaction, forming CO(+), the majority of the CO(+) product ions are formed via electron capture by the CO(2)(2+) rather than via ejection of an electron from the neutral CO(2) reaction partner. The main channels resulting in nondissociative electron transfer are reactions of the ground (X(3)Sigma(g)(-)) and excited states of CO(2)(2+) to give different combinations of the ground and excited states of the product pair of CO(2)(+) ions in which the combination AA appears to be significant. The CO(+) ions appear mainly to arise from slow dissociation of CO(2)(+)(b(4)Pi(u)) formed following electron capture by the ground state of the dication reactant (X(3)Sigma(g)(-)), with possible contributions from electron capture by higher triplet excited states of the dication.
authors.affiliation: V. Cermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejskova 3, 18223 Prague 8, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Zabka
authors.forename: Claire L
authors.initials: CL
authors.lastname: Ricketts
authors.forename: Detlef
authors.initials: D
authors.lastname: Schröder
authors.forename: Jana
authors.initials: J
authors.lastname: Roithová
authors.forename: Helmut
authors.initials: H
authors.lastname: Schwarz
authors.forename: Roland
authors.initials: R
authors.lastname: Thissen
authors.forename: Odile
authors.initials: O
authors.lastname: Dutuit
authors.forename: Stephen D
authors.initials: SD
authors.lastname: Price
authors.forename: Zdenek
authors.initials: Z
authors.lastname: Herman