S II and S III branching ratios in the 600- to 1200-A interval

Details S II and S III branching ratios in the 600- to 1200-A interval S II and S III branching ratios in the 600- to 1200-A interval

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.3233m&link_type=abstract

Journal of Geophysical Research, vol. 88, Apr. 1, 1983, p. 3233-3236.

Physics

5

Electron Transitions, Extreme Ultraviolet Radiation, Io, Satellite Atmospheres, Space Plasmas, Sulfur, Spectrum Analysis, Ultraviolet Spectra, Voyager 1 Spacecraft

Scientific paper

Branching ratios are presented of singly and doubly ionized sulfur EUV emissions. They are determined by measuring the relative photon intensities of each of the branching components. For several transitions in S II for which mean lifetimes have been measured with fast-beam spectroscopy, the data presented here are used to determine transition probabilities. The S II transitions originate from the 2P, 4s-prime 2D, and 4s 2P terms and terminate on the metastable states of the ion. The S III transitions originate from the 3d 3D0, 4s 3P0, 3p3 3S0, 4s 1P0, and 3s3p3 1P0 terms and terminate on the metastable and ground ionic states. The results for S III include branching ratios involving intercombination transitions that affect ongoing modeling of the energy budget of the Io plasma torus.

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