Isotope effects on the charge transfer into the n=1, 2, and 3 shells of He2+ in collisions with H, D, and T

N. Stolterfoht*, R. Cabrera-Trujillo, P. S. Krstic, R. Hoekstra, Y. Oehrn, E. Deumens, J. R. Sabin

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

17 Citations (Scopus)

Abstract

Processes for charge transfer into He2+ colliding with the atomic isotopes hydrogen (H), deuterium (D), and tritium (T) are theoretically studied at collision energies as low as 30 eV/amu. Probabilities and cross sections for electron capture into different shells of the projectile are calculated using an ab initio approach which solves the time-dependent Schrodinger equation. The results are interpreted in terms of radial and rotational couplings between molecular orbitals. The probabilities exhibit strong Stueckelberg oscillations for charge transfer into shells with the principal quantum numbers n = 2 and 3 due to radial coupling mechanisms in specific ranges of the impact parameter. The total cross sections for charge transfer, evaluated for a given shell, differ by orders of magnitude, as different isotopes are used in the collisions. The isotope effect increases significantly for decreasing n = 3, 2, and 1. This finding is attributed to the influence of the rotational coupling mechanism, which is strongly affected by the distance of closest approach between the collision partners.

Original languageEnglish
Article number052704
Pages (from-to)052704
Number of pages10
JournalPhysical Review A
Volume81
Issue number5
DOIs
Publication statusPublished - May-2010

Keywords

  • ELECTRON-CAPTURE
  • SOLAR-WIND
  • EXCITATION
  • IONIZATION
  • EXCHANGE
  • EMISSION
  • HYDROGEN
  • SYSTEMS
  • ATOMS
  • IONS

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