COLLISION STRENGTHS AND EFFECTIVE COLLISION STRENGTHS FOR TRANSITIONS WITHIN THE GROUND-STATE CONFIGURATION OF S III

We have carried out a 29-state R-matrix calculation in order to calculate collision strengths and effective collision strengths for the electron impact excitation of S iii. The recently developed parallel RMATRX II suite of codes have been used, which perform the calculation in intermediate coupling...

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Bibliographic Details
Published in:The Astrophysical journal 2012-05, Vol.750 (1), p.1-7
Main Authors: Hudson, C E, Ramsbottom, C A, Scott, M P
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
ELECTRON COLLISIONS
Electron energy
Electron impact excitation
ELECTRON TEMPERATURE
ELECTRONS
ENERGY RANGE
EXCITATION
FINE STRUCTURE
GROUND STATES
INTERMEDIATE COUPLING
ION COLLISIONS
Joining
Mathematical analysis
R MATRIX
Strength
SULFUR IONS
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Summary:We have carried out a 29-state R-matrix calculation in order to calculate collision strengths and effective collision strengths for the electron impact excitation of S iii. The recently developed parallel RMATRX II suite of codes have been used, which perform the calculation in intermediate coupling. Collision strengths have been generated over an electron energy range of 0-12 Ryd, and effective collision strength data have been calculated from these at electron temperatures in the range 1000-100,000 K. Results are here presented for the fine-structure transitions between the ground-state configurations of 3s super(2)3p super(2) super(3)P sub(0, 1, 2), super(1)D sub(2), and super(1)S sub(0), and the values given resolve a discrepancy between two previous R-matrix calculations.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/750/1/65