Resonance phenomena in electron scattering by atomic oxygen from $9$ to $11.4$ eV

The momentum-space coupled-channels optical method has been used to study negative-ion resonance phenomena in electron impact on atomic oxygen in the energy region of $9-11.4$ eV. Total scattering cross sections have been calculated, and negative-ion resonances have been located. Most of the known resonances of available experimental observations and theoretical results have been confirmed, and some new resonance features have been found in the present calculation.

Figure 1

The present CCO calculation of total cross sections for $e$-O collision from 9 to 11.4 eV, along with available experimental data of Sunshine et al. [21]. The intervals of present calculation were 5 meV (2 meV partly). Arrows are used to mark the centers of the resonance peaks.

Figure 2

Detailed (a) $S$, (b) $P$, and (c) $D$ partial waves symmetries of the present CCO calculation for $e$-O collision from 9 to 11.4 eV at the intervals of 5 meV (2 meV partly). Arrows are used to mark the centers of the resonance peaks.

Figure 3

Partial wave phase shifts of the present CCO calculated resonances in the elastic-scattering region. The dotted line is used to mark the position where the phase shift increases by $\pi /2$ in each case.