Effective collision strengths for transitions within the ground configuration of Fe XXI

Francis Keenan, Kanti Aggarwal

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Effective 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), 2S(2)2p3s, 2s(2)2p3p and 2S(2)2p3d configurations of Fe XXI are computed, over an electron temperature range of 5.6 less than or equal to log T-e less than or equal to 7.4 K, using the recent Dirac Atomic R- matrix Code (DARC) of Norrington and Grant. Results are presented for transitions within the ground configuration only, and are compared with earlier R matrix calculations. Large discrepancies are observed for many transitions, especially at lower temperatures.
Original languageEnglish
Pages (from-to)439-445
Number of pages7
JournalPhysica Scripta
Volume64
Issue number5
Publication statusPublished - Nov 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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