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Electron impact excitation of Al XIII: A relativistic approach*
- Source :
- Astronomy and Astrophysics; March 2005, Vol. 432 Issue: 3 p1151-1155, 5p
- Publication Year :
- 2005
-
Abstract
- Energy levels, radiative rates, collision strengths, and effective collision strengths for all transitions up to and including the $n = 5$levels of Al XIII have been computed in the jjcoupling scheme including relativistic effects. All partial waves with angular momentum $J \le 60$have been included, and resonances have been resolved in a fine energy grid in the threshold region. Collision strengths are tabulated at energies above thresholds in the range $170.0 \le E \le 300.0$Ryd, and results for effective collision strengths, obtained after integrating the collision strengths over a Maxwellian distribution of electron velocities, are tabulated over a wide temperature range of $4.4 \le \log \,T_{\rm e} \le 6.8$K. The importance of including relativistic effects in a calculation is discussed in comparison with the earlier available non-relativistic results.
Details
- Language :
- English
- ISSN :
- 00046361 and 14320746
- Volume :
- 432
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Astronomy and Astrophysics
- Publication Type :
- Periodical
- Accession number :
- ejs53198157
- Full Text :
- https://doi.org/10.1051/0004-6361:20042351