On the dissociative ionization of SO2 in Io's atmosphere

Details On the dissociative ionization of SO2 in Io's atmosphere On the dissociative ionization of SO2 in Io's atmosphere

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.1971m&link_type=abstract

Geophysical Research Letters, vol. 24, p. 1971

Physics

9

Extraterrestrial Environments, Sulfur Dioxides, Atmospheric Ionization, Reaction Kinetics, Dissociation, Photoionization, Monte Carlo Method, Computerized Simulation

Scientific paper

Unattenuated ionization rates for the dissociative photoionization of SO2 producing SO2(+), SO(+), S(+), O(+), and O2(+) ions are reported during solar minimum and maximum conditions. It is found that in the atmosphere of Io the photo-dissociation-ionization of SO2 could be an important source of the production of SO(+), S(+), O(+), and O2(+) ions and that its contribution is much greater (factor of 5-10) compared with that due to direct photoionization of, respectively, SO, S, O, and O2 gases. Role of photoelectron impact ionization of SO2 in producing SO2(+), SO(+), S(+), O(+), and O2(+) ions in the Io's atmosphere is investigated using a Monte Carlo model. It is recommended that the models of Io's ionosphere-atmosphere should include the dissociative ionization of SO2.

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