Excitation rates for transitions in Ca XV

Francis Keenan, Kanti Aggarwal

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Collision strengths for transitions among the energetically lowest 46 fine-structure levels belonging to the (1s(2)) 2s(2)2p(2), 2s2p(3), 2p(4), and 2s(2)2p3l configurations of Ca XV are computed, over a wide electron energy range below 300 Ryd, using the Dirac Atomic R-matrix Code (DARC) of Norrington & Grant (2003). Resonances in the threshold region have been resolved in a fine energy mesh, and excitation rates are determined over a wide electron temperature range below 10(7) K. The results are compared with those available in the literature, and the accuracy of the data is assessed.
Original languageEnglish
Pages (from-to)769-778
Number of pages10
JournalAstronomy and Astrophysics
Volume407
Issue number2
Publication statusPublished - Aug 2003

ASJC Scopus subject areas

  • Space and Planetary Science

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