Electron-impact excitation of Xe26+ and its resultant spectral signature

N.R. Badnell, K.A. Berrington, H.P. Summers, M.G. O'Mullane, A.D. Whiteford, C.P. Ballance

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

We have carried out a 129 close-coupling level Dirac-Coulomb R-matrix calculation for the electron-impact excitation of Ni-like Xe. We have utilized this data to generate the spectral signature of Xe26+ in terms of feature photon-emissivity coefficients F-P ECs. We have compared these F-P ECs with those generated using semi-relativistic plane-wave Born excitation data, which forms the heavy species baseline for the Atomic Data and Analysis Structure (ADAS). We find that the Born-based F-P ECs give a reasonable qualitative description of the spectral signature but that, quantitatively, the R-matrix-based F-P ECs differ by up to a factor of 2. The spectral signature of heavy species is key to diagnosing hot plasmas such as will be found in the International Thermonuclear Experimental Reactor.
Original languageEnglish
Pages (from-to)4589-4601
Number of pages12
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume37
Issue number23
DOIs
Publication statusPublished - 14 Dec 2004

Keywords

  • plasmas
  • spectral signature
  • Xe26+

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