Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9710473a&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A7, July 1, 1992, p. 10,473-10,500. Research sponsored by USAF.
Astronomy and Astrophysics
Astronomy
23
Electron Impact, Fine Structure, Io, Iue, Sulfur Dioxides, Ultraviolet Spectra, Extreme Ultraviolet Radiation, Far Ultraviolet Radiation, Fluorescence, Galileo Project, Hubble Space Telescope, Planetary Atmospheres, Ultraviolet Astronomy
Scientific paper
Measurements of the VUV emission cross sections of SO2 from 40 to 200 nm in the laboratory in a crossed beam experiment are reported. The wavelength range comprised the EUV spectrum, from 40 to 120 nm, and the FUV spectrum, from 120 to 200 nm. The studies included the measurement of excitation functions of the strongest multiplets from 0 to 1 keV impact energy and the identification of dissociation processes from the analysis of the threshold excitation function. It is shown that the FUV emission cross sections for dissociative excitation of atomic multiplets are generally much larger in the FUV than in the EUV. The emission cross sections measured are important for the preparation and data analysis of spacecraft observations of Io to be obtained for the 1990s.
Ajello Joseph M.
Franklin Brian O.
James Geoffrey K.
Kanik Isik
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