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Convergence of two-center expansions in positron-hydrogen collisions

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 نشر من قبل Igor Bray
 تاريخ النشر 1999
  مجال البحث فيزياء
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The positron-hydrogen atom scattering system is considered within the S-wave model. Convergence in the elastic scattering, excitation, ionization, and positronium formation channels is studied as a function of the number and type of states used to expand the total wave function. It is found that all unphysical resonances disappear only if near-complete pseudostate expansions are applied to both the atomic and positronium centers.



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