Schwinger multichannel method: A study of a Feshbach resonance ine-H2collisions

Abstract

We present results of the application of the Schwinger multichannel method to study the role of Feshbach resonances on the elastic and electronic excitation cross sections in e-${\mathrm{H}}_2$ collisions. Using a ${}_{}{}^2{}_{}{}^{}\mathrm{\Sigma }_{\mathrm{g}}^{+}{}_{}{}^{}$ resonance associated with the $a^3$ ${\Sigma }_g^{+}$ and E${}^1$ ${\Sigma }_g^{+}$ states of ${\mathrm{H}}_2$ as an example, we quantitatively illustrate the dramatic influence of open channels on the decay of such Feshbach resonances in electron-molecule collisions.