### Abstract

We present results for the inner-shell electron-impact excitation of Fe15+ using the intermediate-coupling frame transformation R-matrix approach in which Auger-plus-radiation damping has been included. The target and close-coupling expansions are both taken to be the 134 levels belonging to the configurations 2s22p63l, 2s22p53s3l, 2s22p53p2 and 2s22p53p3d. The comparison of Maxwell-averaged effective collision strengths with and without damping shows that the damping reduction is about 30-40% for many transitions at low temperatures, but up to 80% for a few transitions. As a consequence, the results of previous Dirac R-matrix calculations (Aggarwal and Keenan 2008 J. Phys. B: At. Mol. Opt. Phys. 41 015701) overestimate the effective collision strengths due to their omission of Auger-plus-radiation damping.

Original language | English |
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Pages (from-to) | 1-12 |

Number of pages | 11 |

Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |

Volume | 41 |

Issue number | 23 |

DOIs | |

Publication status | Published - Dec 2008 |

### Keywords

- R-matrix
- electron impact
- Fe15+
- auger-plus-radiation
- damping

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## Cite this

Liang, G. Y., Whiteford, A. D., & Badnell, N. R. (2008). R-matrix inner-shell electron-impact excitation of Fe15+ including auger-plus-radiation damping.

*Journal of Physics B: Atomic, Molecular and Optical Physics*,*41*(23), 1-12. https://doi.org/10.1088/0953-4075/41/23/235203