LOW-ENERGY-ELECTRON SCATTERING BY OXYGEN MOLECULES

The R-matrix method has been applied to study the scattering of electr ons by molecular oxygen for a number of internuclear separations, R, i ncluding the equilibrium separation of R(e) almost-equal-to 2.3a0. Res ults have been obtained for 12 scattering symmetries for impact energi es ranging from threshold to 1.0 Ryd. Summed cross sections for elasti c scattering from the ground state, and the corresponding cross sectio ns for transitions from the ground state to the a 1DELTA(g), b1SIGMA(g )+ and the '6 eV' states of oxygen are presented and are compared with experimental data. Finally, the position and width of the resonance i n the 2PI(g) and 2PI(u) scattering symmetries are tabulated for values of R ranging from 1.85 to 2.90 a0.