N+2(X), N+2(A), and N+2(B) production in e-+N2 collisions

Details N+2(X), N+2(A), and N+2(B) production in e-+N2 collisions N+2(X), N+2(A), and N+2(B) production in e-+N2 collisions

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...10023755v&link_type=abstract

Journal of Geophysical Research, Volume 100, Issue A12, p. 23755-23762

Physics

Plasma Physics

22

Ionosphere: Ionization Mechanisms, Ionosphere: Ion Chemistry And Composition, Space Plasma Physics: Ionization Processes, Space Plasma Physics: Laboratory Studies

Scientific paper

A variety of cross-section data for electron-impact ionization of N2 have been analyzed, including those for total N+2 production and for the Meinel and first-negative emissions from excited N+2 ions. These results are used to infer the relative production rates of the N+2(X), N+2 (A), and N+2(B) product ions during the reactions, yielding branching-ratio fractions of 0.320+/-0.147, 0.535+/-0.112, and 0.145+/-0.019, respectively, for 100-eV electrons. The data are compared with the relative formation rates of these ions recently obtained using electron-energy spectroscopy coincidence measurements. The significant discrepancy between these two procedures is discussed, and the results obtained from our data analysis are recommended for auroral modeling at the present time.

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