Electron collision studies on the CH${}_2^{+}$ molecular ion

Abstract

Calculations are performed for electron collision with the methylene molecular ion CH${}_2^{+}$ in its bent equilibrium geometry, with the goal to obtain cross sections for electron impact excitation and dissociation. The polyatomic version of the UK molecular R-matrix codes was used to perform an initial configuration-interaction calculation on the doublet and quartet states of the CH${}_2^{+}$ ion. Subsequently, scattering calculations are performed to obtain electron impact electronic excitation and dissociation cross sections and, additionally, the bound states of the CH${}_2$ molecule and Feshbach resonances in the $e$-CH${}_2^{+}$ system.

6 pages, 6 figures and 3 tables