Electron impact excitation of A1 XIII: A relativistic approach

Francis Keenan, Kanti Aggarwal, S.J. Rose

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Energy levels, radiative rates, collision strengths, and effective collision strengths for all transitions up to and including the n = 5 levels of AlXIII have been computed in the j j coupling scheme including relativistic effects. All partial waves with angular momentum J less than or equal to 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 less than or equal to E less than or equal to 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 less than or equal to log T-e less than or equal to 6.8 K. The importance of including relativistic effects in a calculation is discussed in comparison with the earlier available non-relativistic results.
Original languageEnglish
Pages (from-to)1151-1155
Number of pages5
JournalAstronomy and Astrophysics
Volume432
Publication statusPublished - Mar 2005

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