The Far-Ultraviolet Emission From SO2 by Electron Impact

Details The Far-Ultraviolet Emission From SO2 by Electron Impact The Far-Ultraviolet Emission From SO2 by Electron Impact

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa72a0519v&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SA72A-0519

Physics

5405 Atmospheres: Composition And Chemistry

Scientific paper

The auroral FUV observations of IO by the Space Telescope Imaging Spectrograph (STIS)on board the Hubble Space Telescope (HST) revealed strong emission features of atomic sulfur and atomic oxygen. For the purpose of interpreting these observations laboratory studies of electron-impact UV emission spectrum of S and O bearing species become necessary. Electron-impact UV emission spectrum of SO2 has been studied from 1250~-~1490Å at high resolution (0.1Å) using 100 and 30eV electrons. The laboratory spectrum emitted by dissociatively excited atomic sulfur from SO2 has been compared with HST STIS observations for IO and also with the model spectrum of electron excitation of atomic Sulfur. FUV emission cross sections have been established for fine structure spectral lines of neutral and ionic O and S produced by collision of 100 and 30eV electrons with SO2 molecules.

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