### Abstract

We have carried-out parallel intermediate-coupling frame transformation

*R*-matrix calculations for electron-impact excitation amongst the 204 close-coupling levels of the 2s^{x}2p^{y}(x + y = 3), 2s^{2}{3,4}l, 2s2p{3,4}l, and 2p^{2}3*l*configurations for all boron-like ions from C^{+}to Kr^{31+}. We have also included the configuration interaction due to the 2p^{2}4*l*, 2s3*l*3*l*′ and 2p3s3*l*configurations. A detailed comparison has been made of the target structure and excitation data for four specific ions (viz., Ne^{5+}, Ar^{13+}, Fe^{21+}and Kr^{31+}) that span the sequence, so as to assess the accuracy over the entire sequence. Effective collision strengths (Υs) are presented at temperatures ranging from 2 × 10^{2}(z + 1)^{2}K to 2 × 10^{6}(z + 1)^{2 }K (where z is the residual charge of the ions, i.e. Z − 5). Detailed comparisons for the (effective) collision strengths (Υs) Ω are made with the results of previous calculations for the four representative ions. Furthermore, we examine the iso-electronic trends of the effective collision strengths as a function of temperature.Original language | English |
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Article number | A87 |

Number of pages | 12 |

Journal | Astronomy and Astrophysics |

Volume | 547 |

DOIs | |

Publication status | Published - 1 Nov 2012 |

### Keywords

- atomic data
- atomic processes
- plasmas

## Cite this

Liang, G. Y., Badnell, N. R., & Zhao, G. (2012). R-matrix electron-impact excitation data for the B-like iso-electronic sequence.

*Astronomy and Astrophysics*,*547*, [A87]. https://doi.org/10.1051/0004-6361/201220277