Title: ELECTRON IMPACT EXCITATION OF Fe XV

Authors: K. M. Aggarwal$^\dag$, N. C. Deb$^\ddag$ and A. Z. Msezane$^\ddag$

Affiliations: $^\dag$Department of Pure and Applied Physics, Queen's University, Belfast BT7 1NN, UK

$^\ddag$Department of Physics and CTSPS, Clark Atlanta University, Atlanta, Ga 30314,
USA

Summary: Collision strengths for transitions among the lowest 53 fine-structure levels belonging to
the (1s$^2$2s$^2$2p$^6$) 3${\ell}^2$, 3$\ell$3$\ell^{'}$, 3s4$\ell$ and 3p4s configurations
of Mg-like Fe  have been calculated, at 3 representative energies of 25, 50 and 75 Ryd,
using the Dirac $R$-matrix code. Configuration interaction as well as relativistic effects
have been included while generating the wavefunctions from the GRASP code. Detailed
calculations for collision strengths and rate coefficients are in progress.