SIMBAD references

We present results for the outer-shell electron-impact excitation of all Na-like ions from Mg⁺ to Kr²⁵⁺ obtained using the intermediate-coupling frame transformation R-matrix approach. For each ion's calculation, the target and close-coupling expansions are both taken to be the 18 LS terms (32 levels) belonging to configurations [1s²2s²2p⁶]3l, 4l, 5l and 6l (l=0-5). Effective collision strengths (Υs) are presented at temperatures ranging from 2x10²(q+1)²K to 2x10⁶(q+1)²K (where q is the residual charge of ions, i.e. Z-11). Detailed comparisons for the Υs are made with the results of previous calculations for several ions, which span the sequence. Furthermore, we examine the iso-electronic trends of both low- and high-temperature effective collision strengths