Abstract
The results of a previous Breit-Pauli R-matrix calculation are further analyzed by investigating the effects of various approximations to account for relativistic effects and by studying the convergence of the close-coupling expansion. At very low collision energies (below ≈2 eV), the complicated resonance structure causes significant differences between the results obtained from one-state, three-state and seven-state expansions. In addition, the competition between Mott scattering and the “fine-structure effect” in the elastic channel makes the results for the spin asymmetry functionS A extremely sensitive to the details of the theoretical approximation.
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Bartschat, K. Close-coupling calculations for low-energy elastic electron scattering from thallium atoms. Z Phys D - Atoms, Molecules and Clusters 30, 85–90 (1994). https://doi.org/10.1007/BF01426054
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DOI: https://doi.org/10.1007/BF01426054