Iterative static-exchange techniques applied to low-energy collisions of electrons with molecular ions: H2+, CH+, and N2+

An iterative 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 H2+, CH+, and N2+. In addition, ro-vibrational-excitation cross sections for e+H2+ collisions in the adiabatic nuclei approximation and photoionization cross sections for H2 and N2 are reported