| Issue |
A&A
Volume 533, September 2011
|
|
|---|---|---|
| Article Number | A87 | |
| Number of page(s) | 13 | |
| Section | Atomic, molecular, and nuclear data | |
| DOI | https://doi.org/10.1051/0004-6361/201117616 | |
| Published online | 07 September 2011 | |
R-matrix electron-impact excitation data for astrophysically abundant sulphur ions⋆
1
Department of PhysicsUniversity of Strathclyde,
Glasgow
G4 0NG,
UK
2
National Astronomical Observatories, CAS, Beijing
100012, PR
China
e-mail: gyliang@bao.ac.cn; gzhao@bao.ac.cn
Received: 1 July 2011
Accepted: 26 July 2011
We present results for the electron-impact excitation of highly-charged sulphur ions (S8+–S11+) obtained using the intermediate-coupling frame transformation R-matrix approach. A detailed comparison of the target structure has been made for the four ions to assess the uncertainty on collision strengths from the target structure. Effective collision strengths (Υs) are presented at temperatures ranging from 2 × 102(z + 1)2 K to 2 × 106(z + 1)2 K (where z is the residual charge of ions). Detailed comparisons for the Υs are made with the results of previous calculations for these ions, which will pose insight on the uncertainty in their usage by astrophysical and fusion modelling codes.
Key words: plasmas / atomic processes / atomic data
Data are available in the archives of APAP via http://www.apap-network.org, and OPEN-ADAS via http://open.adas.ac.uk. Data and full Tables 5 and 6 are available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/533/A87
© ESO, 2011
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