Electron collisions with F2CO molecules

Abstract

In this paper we present elastic differential, integral, and momentum-transfer cross sections for electron collisions with carbonyl fluoride $({\mathrm{F}}_{2}\mathrm{CO})$ molecules for the incident electron's energy from 0.5 eV to 20 eV. The Schwinger multichannel method with pseudopotentials was employed to obtain the cross sections in the static-exchange and static-exchange plus polarization approximations. The present results were compared with the available data in the literature, in particular, with the results of Kaur, Mason, and Antony [Phys. Rev. A 92, 052702 (2015)] for the differential, total, and momentum-transfer cross sections. We have found a ${\ensuremath{\pi}}^{*}$ shape resonance centered at 2.6 eV in the ${B}_{1}$ symmetry and other resonance, in the ${B}_{2}$ symmetry, located at around 9.7 eV. A systematic study of the inclusion of polarization effects was performed in order to have a well balanced description of this negative-ion transient state. The effects of the long-range electric dipole potential were included by the Born closure scheme. Electronic structure calculations were also performed to help in the interpretation of the scattering results, and associate the transient states to the unoccupied orbitals.