• Symmetric scattering in electron and positron impact ionization of metastable 2s-state hydrogen atoms

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    • Keywords


      Cross section; collision; ionization; scattering; electron; positron

    • Abstract


      Triple differential cross sections for ionization of hydrogen atoms in the metastable 2s-state by the impact of electrons and positrons have been calculated for coplanar symmetric geometry. In this calculation a multiple scattering theory due to Das [10] and Das and Seal [11] has been used. An analysis of the results reveals that unlike scattering from the ground state, scattering from 2s-state is essentially a higher order process except for the binary collision direction. Moreover, here, the cross section results for 2s-state are much larger compared to those for scattering from the ground state. It is also found that the ionization mechanism at large scattering angles for ionization from the 2s-state is different from that for ionization from the ground state.

    • Author Affiliations


      J N Das1 S Dhar1

      1. Department of Applied Mathematics, University College of Science, 92, Acharya Prafulla Chandra Road, Calcutta - 700 009, India
    • Dates

  • Pramana – Journal of Physics | News

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