The scattering of electrons by sodium atoms

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Abstract
Four state exchange (3s-3p-4s-3d) close coupling equations are solved for the scattering of electrons by sodium atoms at incident energies up to 5 eV. The results are presented in such a form that a number of different measurable quantities may be readily extracted from tables and simple formulae. Total and differential (elastic and inelastic) cross sections, and the polarization of the resonance doublet radiation, are calculated. Results obtained do not differ to any great extent from two state (3s-3p) calculations of the same quantities. Comparison with available experimental data is made; the total cross section disagrees with the experiment of Brode (1929); and the results obtained for the polarization of the radiation fail to remove the discrepancy between the experiment of Hafner and Kleinpoppen (1967) and the two state calculations by Karule (1970). The polarization agrees well with more recent experimental results, as do the differential elastic scattering and 3s to 3p excitation cross sections.

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