Collisonal excitation of Fe X due to electron impact using the R-matrix method

The R-matrix method is used to calculate electron impact collision strengths of chlorine-like Fe X for transitions among the 14 lowest LS states, i.e., up to the 3s334(p-3) 3d state. Configuration interaction wave functions are used to represent the target states included in the R-matrix expansion. Effective collision strengths are calculated among the fine structure levels of ground state and from the ground to excited states by employing a transformation of the LS-coupled reactance matrices, and by assuming a Maxwellian velocity distribution for the incident electron. The results are tabulated for electron temperatures in the range log Te = 4.0 to log Te = 6.4 with Te expressed in kelvins.