Low-energy electron collisions with formamide using theR-matrix method

Abstract

Low-energy electron collisions with formamide are studied using the $R$-matrix method within the static-exchange, static-exchange-polarization, and close-coupling approximations. Twenty target states are included in the close-coupling formalism. The elastic integral, differential, and momentum transfer cross sections and the excitation cross sections from the ground state to the first four low-lying electron excited states are presented in the energy region of 0--10 eV. Besides the low-lying ${}^{2}\phantom{\rule{-0.16em}{0ex}}{A}^{\ensuremath{'}\ensuremath{'}}$ shape resonance indicating good agreement between the present results and the values available in literature, one core-excited resonance (${}^{2}\phantom{\rule{-0.16em}{0ex}}{A}^{\ensuremath{'}\ensuremath{'}}$) and three Feshbach resonances (${}^{2}\phantom{\rule{-0.16em}{0ex}}{A}^{\ensuremath{'}\ensuremath{'}}$, ${}^{2}\phantom{\rule{-0.16em}{0ex}}{A}^{\ensuremath{'}}$, and ${}^{2}\phantom{\rule{-0.16em}{0ex}}{A}^{\ensuremath{'}}$) at the higher energies are predicted, and they could be responsible for the fragments observed in a recent experiment of the dissociative electron attachments to formamide.