Elaborate treatment of the inelastic collisions of positrons with alkali atoms and alkaline-earth positive ions using a restricted coupled-static approximation

Mohamed Assad Abdel-Raouf

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We present the results of a very elaborate investigation of the inelastic collisions of positrons with the ground states of the first four alkali atoms (3Li,11Na,19K and38Rb) and their electronically resemblant alkaline-earth positive ions, i.e. 4Be+,12Mg+,20Ca+ and39Sr+, respectively, using a restricted coupled-static approximation in which the reactance matrices are adjusted to be symmetrical. Our interest is concentrated on the calculation of the total elastic and positronium formation cross-sections and their behaviour in the low-energy region (below 10 eV for the atoms) or the regions above the positronium formation thresholds (when the ions are considered). Our results are the most accurate cross-sections expected from the approximation employed. They reveal, within their limits, the most important characteristics of these cross-sections and provide us with a satisfactory comparison between the main features of positron-atom and positron-ion collisions.

Original languageEnglish
Pages (from-to)339-352
Number of pages14
JournalIl Nuovo Cimento D
Volume12
Issue number3
DOIs
Publication statusPublished - Mar 1 1990

Keywords

  • Charge transfer
  • Inelastic scattering of atoms and molecules

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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