Electron impact excitation of optically allowed and intercombination
electric dipole transitions in Fe XII |

A.M. Binello, H.E. Mason and P.J. Storey |

Astronomy & Astrophysics Supplement Series, 1998, Vol.131, pp.153-166 |

A new, accurate set of electron impact collisional data is presented,
relating to all electric dipole fine-structure transitions between the
ground 3s3p and the first two excited 3s3p, 3s3p3d
configurations in Fe XII (Fe). Theoretical energies have been
obtained with a multi-configuration atomic structure calculation. The *R-matrix* method, coupled with the *Coulomb-Bethe* (CBe) approximation
for the high partial wave contributions to the collision strengths, has been
employed in the Fe - e scattering problem. The data presented in
this paper form part of the *IRON Project* effort to provide the most
accurate atomic data available for all the iron ions (Hummer et al. 1993).

2006-10-25