Dissociative recombination of N2+, O2+, and NO+: Rate coefficients for ground state and vibrationally excited ions

Details Dissociative recombination of N2+, O2+, and NO+: Rate coefficients for ground state and vibrationally excited ions Dissociative recombination of N2+, O2+, and NO+: Rate coefficients for ground state and vibrationally excited ions

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgra..10903302s&link_type=abstract

Journal of Geophysical Research, Volume 109, Issue A3, CiteID A03302

Physics

19

Ionosphere: Ion Chemistry And Composition (0335), Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Ion Chemistry Of The Atmosphere (2419, 2427), Ionosphere: Auroral Ionosphere (2704), Ionosphere: Planetary Ionospheres (5435, 5729, 6026, 6027, 6028)

Scientific paper

We review recent advances in the study of the dissociative recombination of molecular ions with electrons with a primary emphasis on experimental studies. In particular, we focus on previous experimental measurements of recombination rates for N2+, O2+, and NO+ ions. In the context of this review, we present temperature dependent rate coefficients from recent merged beam studies of the dissociative recombination of N2+, O2+, and NO+ ions with electrons. Identifying underlying physical differences between the various experimental techniques enables a discussion of the effects of vibrational excitation on the dissociative recombination of these major ionospheric species of ions. For T < 1200 K, we conclude that the recombination rates for N2+, O2+, and NO+ ions in the ground electronic and vibrational states respectively are 2.2 × 10-7 (Te/300)-0.39 cm3 s-1, 1.95 × 10-7(Te/300)-0.70 cm3 s-1, and (3.5 +/- 0.5) × 10-7(Te/300)-0.69 cm3 s-1. Vibrational excitation is shown to play a significant role in laboratory measurements of these recombination rates. For each of these species, vibrationally excited ions yielded a lower recombination rate than the ground state. We also discuss the recombination of these species of ions for T > 1200 K.

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