R-matrix inner-shell electron-impact excitation of the Na-like iso-electronic sequence

A.D. Whiteford, G.Y. Liang, N.R. Badnell

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We present results for the inner-shell electron-impact excitation of all Na-like ions from Mg+ to Kr25+ obtained using the intermediate-coupling frame transformation R-matrix method with both Auger and radiation damping included via the optical potential approach. For each ion, the target and close-coupling expansions are taken to be the 59 LS terms (134 levels) belonging to configurations 2s22p63l, 2s22p53s3l (l s, p, d), 2s22p53p2 and 2s22p53p3d. Radial wavefunctions were obtained using autostructure. Effective collision strengths are presented at temperatures ranging from 2 × 102(q + 1)2 K to 2 × 106(q + 1)2 K (where q is the residual charge of ions, i.e. Z − 11). Comparisons for the collision strengths and effective collision strengths are made with the results of other calculations for several ions which span the sequence. The Auger and radiation damping effects along the sequence have also been explored and their importance is highlighted. We further examine iso-electronic trends of both low- and high-temperature effective collision strengths
LanguageEnglish
Pages225002
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume42
Issue number22
DOIs
Publication statusPublished - 5 Nov 2009

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electron impact
collisions
electronics
excitation
ions
damping
radiation
matrix methods
trends
expansion
configurations
temperature

Keywords

  • atomic and molecular physics
  • computational physics

Cite this

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title = "R-matrix inner-shell electron-impact excitation of the Na-like iso-electronic sequence",
abstract = "We present results for the inner-shell electron-impact excitation of all Na-like ions from Mg+ to Kr25+ obtained using the intermediate-coupling frame transformation R-matrix method with both Auger and radiation damping included via the optical potential approach. For each ion, the target and close-coupling expansions are taken to be the 59 LS terms (134 levels) belonging to configurations 2s22p63l, 2s22p53s3l (l s, p, d), 2s22p53p2 and 2s22p53p3d. Radial wavefunctions were obtained using autostructure. Effective collision strengths are presented at temperatures ranging from 2 × 102(q + 1)2 K to 2 × 106(q + 1)2 K (where q is the residual charge of ions, i.e. Z − 11). Comparisons for the collision strengths and effective collision strengths are made with the results of other calculations for several ions which span the sequence. The Auger and radiation damping effects along the sequence have also been explored and their importance is highlighted. We further examine iso-electronic trends of both low- and high-temperature effective collision strengths",
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R-matrix inner-shell electron-impact excitation of the Na-like iso-electronic sequence. / Whiteford, A.D.; Liang, G.Y.; Badnell, N.R.

In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 42, No. 22, 05.11.2009, p. 225002.

Research output: Contribution to journalArticle

TY - JOUR

T1 - R-matrix inner-shell electron-impact excitation of the Na-like iso-electronic sequence

AU - Whiteford, A.D.

AU - Liang, G.Y.

AU - Badnell, N.R.

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Y1 - 2009/11/5

N2 - We present results for the inner-shell electron-impact excitation of all Na-like ions from Mg+ to Kr25+ obtained using the intermediate-coupling frame transformation R-matrix method with both Auger and radiation damping included via the optical potential approach. For each ion, the target and close-coupling expansions are taken to be the 59 LS terms (134 levels) belonging to configurations 2s22p63l, 2s22p53s3l (l s, p, d), 2s22p53p2 and 2s22p53p3d. Radial wavefunctions were obtained using autostructure. Effective collision strengths are presented at temperatures ranging from 2 × 102(q + 1)2 K to 2 × 106(q + 1)2 K (where q is the residual charge of ions, i.e. Z − 11). Comparisons for the collision strengths and effective collision strengths are made with the results of other calculations for several ions which span the sequence. The Auger and radiation damping effects along the sequence have also been explored and their importance is highlighted. We further examine iso-electronic trends of both low- and high-temperature effective collision strengths

AB - We present results for the inner-shell electron-impact excitation of all Na-like ions from Mg+ to Kr25+ obtained using the intermediate-coupling frame transformation R-matrix method with both Auger and radiation damping included via the optical potential approach. For each ion, the target and close-coupling expansions are taken to be the 59 LS terms (134 levels) belonging to configurations 2s22p63l, 2s22p53s3l (l s, p, d), 2s22p53p2 and 2s22p53p3d. Radial wavefunctions were obtained using autostructure. Effective collision strengths are presented at temperatures ranging from 2 × 102(q + 1)2 K to 2 × 106(q + 1)2 K (where q is the residual charge of ions, i.e. Z − 11). Comparisons for the collision strengths and effective collision strengths are made with the results of other calculations for several ions which span the sequence. The Auger and radiation damping effects along the sequence have also been explored and their importance is highlighted. We further examine iso-electronic trends of both low- and high-temperature effective collision strengths

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