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A matrix variational calculation has been done for electron scattering by atomic O, which includes 2s²2p⁴, 2s2p⁵, and 2p⁶ target configurations and all possible single excitations of the $2p$ orbital. Integral and differential cross sections are reported for elastic and inelastic scattering for energies up to the first $n=3$ excitation threshold. The full effects of long-range polarization and short-range correlation appear to be nearly completely accounted for. No low-lying resonances are observed.
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Thomas et al. (1975) studied this question.
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