Fully differential cross sections for Li2+-impact ionization of Li(2s) and Li(2p)

Omid Ghorbani, Ebrahim Ghanbari-Adivi, Marcelo Fabian Ciappina

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2 Scopus citations

Abstract

A semiclassical impact parameter version of the continuum distorted wave-Eikonal initial state theory is developed to study the differential ionization of Li atoms in collisions with Li2+ ions. Both post and prior forms of the transition amplitude are considered. The fully differential cross sections are calculated for the lithium targets in their ground and their first excited states and for the projectile ions at 16 MeV impact energy. The role of the inter-nuclear interaction as well as the significance of the post-prior discrepancy in the ejected electron spectra are investigated. The obtained results for ejection of the electron into the azimuthal plane are compared with the recent measurements and with their corresponding values obtained using a fully quantum mechanical version of the theory. In most of the cases, the consistency of the present approach with the experimental and the quantum theoretical data is reasonable. However, for 2p-state ionization, in the cases where no experimental data exist, there is a considerable difference between the two theoretical approaches. This difference is questionable and further experiments are needed to judge which theory makes a more accurate description of the collision dynamics.

Original languageEnglish
Article number095202
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume51
Issue number9
DOIs
StatePublished - 16 Apr 2018
Externally publishedYes

Keywords

  • 3DW-EIS theory
  • CDW-EIS approach
  • binary peak
  • fully differential cross sections
  • ionization

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