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1. Nuclear-Charge Screening in Positronium Formation from Helium Atoms

E. Ghanbari-Adivi

Volume 23, Issue 4 , Autumn 2012, , Pages 357-365

Abstract
  An analytical treatment of the electron screening effect within an active-electron model is given for positronium formation from helium atoms. A first-order distorted wave approximation with correct boundary conditions is applied to evaluate the transition amplitude. In the range of impact energy for ...  Read More