Iterative static-exchange techniques applied to low-energy collisions of electrons with molecular ions:H2+, CH+, andN2+

An interative static-exchange single-center close-coupling procedure is applied to electron collisions with molecular ions. The method is taken mutatus mutandus from a procedure used previously to study electron neutral-molecule collisions. The procedure is found to be both stable and efficient for calculating static-exchange level wave functions and eigenphases. The method is applied to electron collisions with $\mathrm{H}_2^{}{}_{}{}^{+}$, C${\mathrm{H}}^{+}$, and $\mathrm{N}_2^{}{}_{}{}^{+}$. In addition, ro-vibrational-excitation cross sections for $e$ + $\mathrm{H}_2^{}{}_{}{}^{+}$ collisions in the adiabatic nuclei approximation and photoionization cross sections for ${\mathrm{H}}_2$ and ${\mathrm{N}}_2$ are reported.