### 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.

Original language | English |
---|---|

Pages (from-to) | 763-770 |

Number of pages | 8 |

Journal | Astronomy and Astrophysics |

Volume | 466 |

Issue number | 2 |

DOIs | |

Publication status | Published - May 2007 |

### Fingerprint

### Keywords

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

### Cite this

*Astronomy and Astrophysics*,

*466*(2), 763-770. https://doi.org/10.1051/0004-6361:20066782

}

*Astronomy and Astrophysics*, vol. 466, no. 2, pp. 763-770. https://doi.org/10.1051/0004-6361:20066782

**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.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Atomic data from the IRON project LXIII

T2 - Electron-impact excitation of Fe19+ up to n=4

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

JF - Astronomy and Astrophysics

SN - 0004-6361

IS - 2

ER -