Electron collisions with Fe IV ions

Collision strength calculations performed with 108 coupled states (in LS-coupling) using the parallel R-matrix code PRMAT are used to determine the effective collision strengths by averaging them over a Maxwellian temperature distribution for the electrons.

Each of the LS term level is assigned a label ranging from 1 to 108. Note; 1 to 16 refers to states associated with the 3d(5) configuration; 6S, 4G, 4P, 4D, 2I, 2D3, 2F2, 4F, 2H, 2G2, 2F1, 2S, 2D2, 2G, 2P and 2D1. Effective collision strengths data for 11 temperatures are presented (non-zero values) for electron temperatures ranging from ~2000 to 1000000K (i.e. log10(T)=3.3 to log10(T)=6.0).