ScII effective collision strengths

There is a severe paucity of data available for ScII, highlighted by the fact that no collision strengths are readily available for this ion. We present electron-impact excitation collision strengths and Maxwellian averaged effective collision strengths for ScII.

The collision strengths were calculated for all 3916 transitions amongst 89 jj levels (arising from the 3d4s, 3d^2^, 4s^2^, 3d4p, 4s4p, 3d5s, 3d4d, 3d5p, 4p^2^ and 3d4f configurations), resulting in a 944 coupled channel problem. The R-matrix package RMATRXII was utilized, along with the transformation code fine and the external region code pstgf, to calculate the collision strengths for a range of incident electron energies in the 0 to 8.3 Rydberg region.