Production of positronium in ground- And excited-states from positron-lithium scattering

S. Y. El-Bakry, M. A. Abdel-Raouf

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The production of positronium during inelastic collisions of positrons with lithium atoms is a multi-channel process in which elastic scattering and positronium formation in the ground and excited-states should be considered. Thus, the problem is at least a three-channel problem. In the present work, a rather complicated computer code is developed based on the coupled-static, frozen core and Green's function partial wave expansion technique. The code is employed for treating the positron-lithium multi-channel process with the assumption that the elastic (2s channel of Li), the ground-state of positronium (or Is state) as well as the excited-state of positronium (taken as pure 2s state or as a mixture of 2s and 2p states) are open. The polarization potentials of the lithium and the excited positronium are taken into consideration. The total cross-sections, calculated with eight partial waves corresponding to the total angular momentum l = 0 to l = 7, are determined over a wide region of scattering energies ranging from 3.4 to 20 eV.

Original languageEnglish
Pages (from-to)149-154
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Issue number1-2
Publication statusPublished - Aug 2 1998
Externally publishedYes


  • Alkali atoms
  • Collisions
  • Cross-sections
  • Excited states
  • Inelastic scattering
  • Lithium
  • Polarization potential
  • Positron
  • Positronium formation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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