LOW-ENERGY-ELECTRON SCATTERING BY OXYGEN MOLECULES .2. VIBRATIONAL-EXCITATION

The R-matrix method has been applied to study the scattering of low-en ergy electrons by molecular oxygen in the (2) Pi(g) scattering symmetr y. The non-adiabatic approach has been adopted to obtain cross section s corresponding to purely elastic scattering and excitation to the nu = 1, 2 and 3 vibrational levels of the (3) Sigma(g)(-) ground state fo r energies ranging from threshold to 1.0 eV. In addition, cross sectio ns for excitation to the nu = 0 vibrational level of the (1) Delta(g) excited state are presented for energies below 1.6 eV. A number of the cross sections are dominated by narrow resonances corresponding to th e vibrational levels of the (2) Pi(g) state of O-2(-). The positions a nd widths of these resonances have been calculated and are found to be in good agreement with the experiments of Field et al (1991).