Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phys...35..831h&link_type=abstract
(Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysics and Fusion Research, 2nd, Toledo, OH, Aug. 1986) Physica
Astronomy and Astrophysics
Astrophysics
21
Electron Transitions, Io, Oscillator Strengths, Space Plasmas, Sulfur, Toroidal Plasmas, Emission Spectra, Forbidden Transitions, Oxygen Ions, Particle Collisions, Ultraviolet Spectra
Scientific paper
A series of calculations for atomic data of various sulfur and oxygen ions is examined. Recent observations of the Io plasma torus obtained with the Voyager UV Spectrometer, the IUE satellite short wavelength spectrograph, and the rocket-borne faint object telescope are discussed. The calculation of oscillator strengths for S II, the P I sequence, S I, and S III in terms of configuration interaction effects is described. The derivation of orbital wave functions is considered. The use of the close coupling method to estimate collision strengths is studied. The accuracy of these calculations depends on: (1) the number of states used in the close coupling expansion; (2) resonance contributions to the thermally averaged collision strength; and (3) the quality of the target state wave functions. Tables of the derived oscillator strengths are presented.
Henry Ronald J. W.
Ho Yeap Kim
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