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Collision strengths for dipole-allowed transitions in S IICalculations of collision strengths for electron-impact excitations of S II from the ground state 3p3 4S0 to excited states 3p4 4P, 3d 4F, 3d 4D, 4s 4P, and 3d 4P were carried out using the R-matrix code described by Berrington et al. (1978) and the NIEM code described by Henry et al. (1981). Results are presented for the thermally averaged collision strengths for the five-state and six-state calculations. Convergence behaviors were examined by comparison with the six-state calculations and the previously obtained two-state calculations. Uncertainties for these transitions were estimated to be within 20 percent, except for the 4S0 - 3p4 4P transition in which a 40 percent uncertainty was estimated.
Document ID
19900038870
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ho, Y. K.
(Louisiana State University Baton Rouge, United States)
Henry, Ronald J. W.
(Auburn University AL, United States)
Date Acquired
August 14, 2013
Publication Date
March 10, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 351
ISSN: 0004-637X
Subject Category
Lunar And Planetary Exploration
Accession Number
90A25925
Funding Number(s)
CONTRACT_GRANT: NAGW-48
Distribution Limits
Public
Copyright
Other

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