Atomic data from the IRON project LXIII: Electron-impact excitation of Fe19+ up to n=4

M. C. Witthoeft, G. Del Zanna, N. R. Badnell

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We present results for the electron-impact excitation of N-like Fe as part of the RmaX network. R-matrix theory using an intermediatec-oupling frame transformation method is used to obtain level-resolved collision strengths. Separate calculations are performed using different target expansions. The first is a 215 level close-coupling calculation which has the 2s(2) 2p(3), 2s 2p(4), 2p(5), 2s(2) 2p(2) 3l, and 2s 2p3 3l configurations while the second calculation also includes the levels from the 2s(2) 2p(2) 4l configurations for a total of 302 close-coupling levels. The effect of the additional resonant enhancement of the larger calculation is explored and compared with a previous IRON Project report and other, more recent, calculations. As a final comparison, we model an astrophysical plasma using the results of the present calculations and previous work.

LanguageEnglish
Pages763-770
Number of pages8
JournalAstronomy and Astrophysics
Volume466
Issue number2
DOIs
Publication statusPublished - May 2007

Fingerprint

electron impact
electron
excitation
matrix theory
configurations
calculation
project
astrophysics
collision
plasma
matrix
collisions
expansion
augmentation

Keywords

  • atomic data
  • atomic processes
  • scattering
  • highly ionized iron
  • emission lines
  • FE-XX
  • ions
  • transitions
  • plasmas

Cite this

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title = "Atomic data from the IRON project LXIII: Electron-impact excitation of Fe19+ up to n=4",
abstract = "We present results for the electron-impact excitation of N-like Fe as part of the RmaX network. R-matrix theory using an intermediatec-oupling frame transformation method is used to obtain level-resolved collision strengths. Separate calculations are performed using different target expansions. The first is a 215 level close-coupling calculation which has the 2s(2) 2p(3), 2s 2p(4), 2p(5), 2s(2) 2p(2) 3l, and 2s 2p3 3l configurations while the second calculation also includes the levels from the 2s(2) 2p(2) 4l configurations for a total of 302 close-coupling levels. The effect of the additional resonant enhancement of the larger calculation is explored and compared with a previous IRON Project report and other, more recent, calculations. As a final comparison, we model an astrophysical plasma using the results of the present calculations and previous work.",
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author = "Witthoeft, {M. C.} and {Del Zanna}, G. and Badnell, {N. R.}",
year = "2007",
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language = "English",
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Atomic data from the IRON project LXIII : Electron-impact excitation of Fe19+ up to n=4. / Witthoeft, M. C.; Del Zanna, G.; Badnell, N. R.

In: Astronomy and Astrophysics, Vol. 466, No. 2, 05.2007, p. 763-770.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Atomic data from the IRON project LXIII

T2 - Astronomy and Astrophysics

AU - Witthoeft, M. C.

AU - Del Zanna, G.

AU - Badnell, N. R.

PY - 2007/5

Y1 - 2007/5

N2 - We present results for the electron-impact excitation of N-like Fe as part of the RmaX network. R-matrix theory using an intermediatec-oupling frame transformation method is used to obtain level-resolved collision strengths. Separate calculations are performed using different target expansions. The first is a 215 level close-coupling calculation which has the 2s(2) 2p(3), 2s 2p(4), 2p(5), 2s(2) 2p(2) 3l, and 2s 2p3 3l configurations while the second calculation also includes the levels from the 2s(2) 2p(2) 4l configurations for a total of 302 close-coupling levels. The effect of the additional resonant enhancement of the larger calculation is explored and compared with a previous IRON Project report and other, more recent, calculations. As a final comparison, we model an astrophysical plasma using the results of the present calculations and previous work.

AB - We present results for the electron-impact excitation of N-like Fe as part of the RmaX network. R-matrix theory using an intermediatec-oupling frame transformation method is used to obtain level-resolved collision strengths. Separate calculations are performed using different target expansions. The first is a 215 level close-coupling calculation which has the 2s(2) 2p(3), 2s 2p(4), 2p(5), 2s(2) 2p(2) 3l, and 2s 2p3 3l configurations while the second calculation also includes the levels from the 2s(2) 2p(2) 4l configurations for a total of 302 close-coupling levels. The effect of the additional resonant enhancement of the larger calculation is explored and compared with a previous IRON Project report and other, more recent, calculations. As a final comparison, we model an astrophysical plasma using the results of the present calculations and previous work.

KW - atomic data

KW - atomic processes

KW - scattering

KW - highly ionized iron

KW - emission lines

KW - FE-XX

KW - ions

KW - transitions

KW - plasmas

U2 - 10.1051/0004-6361:20066782

DO - 10.1051/0004-6361:20066782

M3 - Article

VL - 466

SP - 763

EP - 770

JO - Astronomy and Astrophysics

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SN - 0004-6361

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