• Coulomb—Born—Oppenheimer approximation in Ps—H scattering

    • Fulltext


        Click here to view fulltext PDF

      Permanent link:

    • Keywords


      Positronium; ionization; exchange; electron-spin; continuum; Coulomb wave function

    • Abstract


      To improve the Coulomb-Born approximation (CBA) theory of ionization in positronium (Ps) and atom scattering, the effect of exchange is introduced. The nine-dimensional exchange amplitude for ionization of Ps in Ps—H scattering is reduced to a two-dimensional integral using the present Coulomb-Born-Oppenheimer approximation (CBOA). The methodology is extremely useful to evaluate ionization parameters for different target systems and for different types of ionization processes. It is then applied to evaluate the Ps-ionization cross-section and to estimate the effect of exchange on Psionization in Ps-H system. We establish the importance of exchange at lower energy region.

    • Author Affiliations


      Hasi Ray1

      1. Department of Physics, Indian Institute of Technology Roorkee, Roorkee - 247 667, India
    • Dates

  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.