Dissociative recombination of N2H/+/ and N2D/+/

Details Dissociative recombination of N2H/+/ and N2D/+/ Dissociative recombination of N2H/+/ and N2D/+/

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...227l.157m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 227, Feb. 1, 1979, p. L157-L159. Research supported by the U.S. Depa

Astronomy and Astrophysics

Astrophysics

18

Interstellar Gas, Ion Recombination, Molecular Ions, Nitrogen Compounds, Cross Sections, Deuterium Compounds, Electron Energy, Hydrates, Isotope Effect, Reaction Kinetics

Scientific paper

A merged electron-ion beam apparatus has been used to measure cross sections for the dissociative recombination of N2H(+) and N2D(+) over the electron energy range from 0.006 to 0.75 eV. It is found that the dissociative-recombination cross sections vary nearly as the inverse of electron energy between 0.006 and 0.05 eV. By assuming a Maxwellian electron-velocity distribution, values of the rate coefficient are calculated in the electron temperature range from 10 to 10,000 K. The rate coefficient for both ions is shown to vary as the -0.5 power of electron temperature below approximately 300 K. A value of 1.5 x 10 to the -6th cu cm per sec at 100 K is reported for the rate coefficients of both N2H(+) and N2D(+). The results are compared with previous measurements for H3O(+), H3(+), D3O(+), HD2(+), and D3(+). It is concluded that there is an isotope effect on the dissociative recombination, that the rate coefficients of dissociative recombination for HCO(+) and DCO(+) are likely to be the same, and that the rate coefficients for the same ions are not greatly different from those for N2H(+) and N2D(+).

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