Description
Collision strengths for transitions among the lowest 48 fine-structure levels belonging to the (1s^2^2s^2^2p^6^) 3s^2^3p^4^, 3s3p^5^, 3s^2^3p^3^3d and 3p^6^ configurations of Fe XI have been calculated using the Dirac Atomic R-matrix Code (DARC) of Norrington & Grant (2003, Comput. Phys. Commun., in prep.). Results are tabulated at energies above thresholds in the range 10<=E<=100Ry, although resonances have been resolved in a fine energy mesh in the thresholds region. Effective collision strengths, obtained after integrating the collision strengths over a Maxwellian distribution of electron velocities, are also tabulated over a wide electron temperature range below 5x10^6^K. Comparisons with other available results are made, and the accuracy of the present data is assessed.
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