Four-body treatment of the K-shell positronium formation from multi-electron atoms

• Authors: Ebrahim Ghanbari-Adivi , Azime Velayati
• Languages of publication: EN

Abstracts

EN

The four-body Coulomb-Born distorted-wave approximation with correct boundary conditions (CBDW-4B) is applied to the K-shell positronium formation from multi-electron atoms at intermediate and high impact energies. In the present approach, both K-shell electrons are treated as active electrons. For collisions of positrons with helium, carbon, and neon atoms, both the post and prior forms of the transition amplitude are calculated and the corresponding differential and integral cross sections are compared with the results of the three-body version of the formalism (CBDW-3B). In order to investigate the effects of the static electronic correlations on the process, initial bound states of the active electrons in helium atoms are described by Hylleraas and Silverman wave functions. Also for positronium formation from helium atoms the obtained cross sections are compared with the available experimental data and also with the results of the other theories.

Keywords

EN

Coulomb-Born distorted-wave approximation; K-shell electron captur; Coulomb boundary conditions; differential and total cross sections

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2014
• Volume: 12
• Issue: 3
• Pages: 192-202

Dates

published

1 - 3 - 2014

online

13 - 3 - 2014

Contributors

author

Ebrahim Ghanbari-Adivi

• Department of Physics and Isfahan Quantum Optics Group(IQOG), Faculty of Science, University of Isfahan, Isfahan, 81746-73441, Iran

author

Azime Velayati

• Department of Physics and Isfahan Quantum Optics Group(IQOG), Faculty of Science, University of Isfahan, Isfahan, 81746-73441, Iran

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Identifiers

DOI

10.2478/s11534-014-0436-0