Physics
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...10121151l&link_type=abstract
Journal of Geophysical Research, Volume 101, Issue E9, p. 21151-21156
Physics
14
Planetology: Solar System Objects: Jovian Satellites, Planetology: Fluid Planets: Tori And Exospheres, Atmospheric Composition And Structure: General Or Miscellaneous
Scientific paper
Absolute partial cross sections for the production of SO+2, SO+, (S++O2+SO22+), O+, and SO2+ from electron impact ionization of SO2 are reported for electron energies from threshold to 1000 eV. The product ions are analyzed using a time-of-flight mass spectrometer and detected with a position-sensitive detector, making it possible to demonstrate complete collection of all product ions. The overall uncertainty in the absolute cross section values is +/-3.5% for SO2+ ions and is slightly higher for fragment and multiply charged ions. While much of the previously published data are in reasonable agreement with the data presented here, the present O+ cross section is higher than earlier measurements by approximately a factor of 3. The cross section for production of SO2+ has not been previously reported. The sum of the partial cross sections is compared to previously measured total cross sections.
Lindsay Bruce G.
Smith Anna K.
Stebbings R. F.
Straub H. C.
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