Abstract
In the present article we report a comprehensive calculation of total and differential cross sections for electron impact on allene (C${}_{3}$H${}_{4}$) molecule. The total cross sections are computed for a wide electron energy range from 0.1 eV to 2 keV. We have employed $R$-matrix code through quantemol-n software for ab initio calculations below 10 eV while intermediate- to high-energy calculations are performed using the spherical complex optical potential formalism. The two methods are found to be consistent at around 3 eV, merging smoothly. The results for both total and differential cross sections are in good agreement with previous results wherever available. We have also observed the presence of a shape resonance at 2.9 eV due to degenerate (${}^{2}$${B}_{1}$, ${}^{2}$${B}_{2}$) states. The electronic excitation cross section for $e$-C${}_{3}$H${}_{4}$ scattering is reported.
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