R-matrix electron-impact excitation calculations along the F-like iso-electronic sequence

M. C. Witthoeft, A. D. Whiteford, N. R. Badnell

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We present results for the electron-impact excitation of F-like ions from Ne+ to Kr27+ using an R-matrix approach where the intermediate-coupling frame transformation method has been used to obtain level-resolved collision strengths. For each calculation, the target has been expanded using 87 terms ( 195 levels) with the following configuration basis: 2s(2) 2p(5), 2s 2p(6), 2s2 2p(4) 3l, 2s 2p(5) 3l and 2s(2) 2p(4) 4l. Comparisons are made with previous R-matrix calculations for the fine-structure transition over the whole sequence and other, more extensive, calculations on Ne+ and Fe17+. We examine iso-electronic trends of both low-and high-temperature effective collision strengths. This complete, self-consistent set of radiative and collision data is archived in multiple databases.

LanguageEnglish
Pages2969-2993
Number of pages25
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume40
Issue number15
DOIs
Publication statusPublished - 14 Aug 2007

Fingerprint

electron impact
collisions
electronics
excitation
fine structure
trends
configurations
ions

Keywords

  • fluorine like ions
  • fine structure transition
  • iron project
  • atomic data
  • ionization
  • NI

Cite this

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abstract = "We present results for the electron-impact excitation of F-like ions from Ne+ to Kr27+ using an R-matrix approach where the intermediate-coupling frame transformation method has been used to obtain level-resolved collision strengths. For each calculation, the target has been expanded using 87 terms ( 195 levels) with the following configuration basis: 2s(2) 2p(5), 2s 2p(6), 2s2 2p(4) 3l, 2s 2p(5) 3l and 2s(2) 2p(4) 4l. Comparisons are made with previous R-matrix calculations for the fine-structure transition over the whole sequence and other, more extensive, calculations on Ne+ and Fe17+. We examine iso-electronic trends of both low-and high-temperature effective collision strengths. This complete, self-consistent set of radiative and collision data is archived in multiple databases.",
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R-matrix electron-impact excitation calculations along the F-like iso-electronic sequence. / Witthoeft, M. C.; Whiteford, A. D.; Badnell, N. R.

In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 40, No. 15, 14.08.2007, p. 2969-2993.

Research output: Contribution to journalArticle

TY - JOUR

T1 - R-matrix electron-impact excitation calculations along the F-like iso-electronic sequence

AU - Witthoeft, M. C.

AU - Whiteford, A. D.

AU - Badnell, N. R.

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Y1 - 2007/8/14

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AB - We present results for the electron-impact excitation of F-like ions from Ne+ to Kr27+ using an R-matrix approach where the intermediate-coupling frame transformation method has been used to obtain level-resolved collision strengths. For each calculation, the target has been expanded using 87 terms ( 195 levels) with the following configuration basis: 2s(2) 2p(5), 2s 2p(6), 2s2 2p(4) 3l, 2s 2p(5) 3l and 2s(2) 2p(4) 4l. Comparisons are made with previous R-matrix calculations for the fine-structure transition over the whole sequence and other, more extensive, calculations on Ne+ and Fe17+. We examine iso-electronic trends of both low-and high-temperature effective collision strengths. This complete, self-consistent set of radiative and collision data is archived in multiple databases.

KW - fluorine like ions

KW - fine structure transition

KW - iron project

KW - atomic data

KW - ionization

KW - NI

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