An effective optical potential approach is applied to the scattering of electrons by ${\mathrm{H}}_2^{+}$ within the linear algebraic prescription. Widths and positions of the lowest few ${}_{}{}^1{}_{}{}^{}\Sigma _g^{}{}_{}{}^{}$ resonances appearing in the elastic-scattering channel are calculated and compared with the results of other methods.

• Received 7 February 1983

DOI:https://doi.org/10.1103/PhysRevA.28.166