Rotational excitation of H2 by positron impact in adiabatic rotational approximation

  • Guilherme Luiz Zanin
  • Wagner Tenfen
  • Felipe Arretche
Regular Article
Part of the following topical collections:
  1. Topical Issue: Advances in Positron and Electron Scattering

Abstract

We present rotational excitation cross sections for low energy scattering of positrons by H2, below positronium formation threshold (≈8.2 eV). The cross sections were computed from fixed-nuclei scattering amplitudes generated with the Schwinger multichannel method using the adiabatic rotational approximation. Comparison with other similar theoretical results shows that the magnitude of the cross section associated to the transition Ji = 0 → Jf = 2 is strongly affected by the methodology used to model the correlation-polarization effects.

Graphical abstract

Keywords

Atomic and Molecular Collisions 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Guilherme Luiz Zanin
    • 1
  • Wagner Tenfen
    • 2
  • Felipe Arretche
    • 1
  1. 1.Departamento de Física, Universidade Federal de Santa CatarinaFlorianópolisBrazil
  2. 2.Departamento de Física, Universidade Federal da Fronteira SulRealezaBrazil

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