Electron-excitation of forbidden transitions |

in V-like ions Mn-III, Fe-IV, Co-V and Ni-VI |

Berrington.KA, Pelan.JC |

Astronomy & Astrophysics Supplement Series, 1995, Vol.114, No.2, pp.367-371 |

Electron excitation collision strengths for fine-structure transitions involving the four lowest 3d terms (S, G, , D) in vanadium-like ions Mn III, Fe IV, Co V and Ni VI are calculated using R-matrix techniques. All five sextet and quartet 3d target terms are included in the expansion of the total wavefunction. Fine-structure collision strengths are obtained from an algebraic transformation of the reactance matrices. These collision strengths are then averaged over a Maxwellian velocity distribution to obtain effective collision strengths as a function of electron temperature. To our knowledge, these are the first published data for these processes.

**NB** There is an erratum for Table 5 of this paper for Fe IV.
See Errata.

2006-10-25