Rate constants and branching ratios for the dissociative recombination of CO2+

Details Rate constants and branching ratios for the dissociative recombination of CO2+ Rate constants and branching ratios for the dissociative recombination of CO2+

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jchph.122v6101v&link_type=abstract

Journal of Chemical Physics, Volume 122, Issue 22, pp. 226101-226101-3 (2005).

Physics

Chemical Physics

11

Rate Constants, Reaction Cross Sections, And Activation Energies, Decomposition Reactions, Dissociation And Dissociative Attachment By Electron Impact, Electron-Ion Recombination And Electron Attachment

Scientific paper

Product branching ratios and thermal rate coefficients for the dissociative recombination of CO2+ have been measured in the cryogenic ion source ring ion storage ring. The rate constants were found to be 4.2×10-7(Te/300)-0.75 cm3 s-1. The 300-K result is in agreement with previous flowing afterglow values and is somewhat smaller than a recent determination made at the Aarhas storage ring in Denmark (ASTRID) storage ring. The electron temperature dependence is, however, in good agreement with the ASTRID result of T-0.8. The present results show that only CO plus O are formed, other product branching ratios are zero within experimental error. This is in contradiction to the ASTRID results which show that 9% of the reactivity goes to C+O2. The new results show that the C+O2 channel does not need to be included in the models of the ionospheres of Venus and Mars.

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