Direct charge transfer ofHe+in neon

Abstract

The cross sections for direct charge transfer of ${\mathrm{He}}^{+}$ ions in low-energy collisions with neon atoms are calculated in a diabatic formulation for several choices of the origin of coordinates. It is shown numerically that the omission of electronic translation factors creates serious uncertainties at intermediate energies. The differences in the cross sections diminish as the collision energies increase to 900 eV where they attain a value of 1×${10}^{\mathrm{-}16}$ ${\mathrm{cm}}^2$. Direct charge transfer is more efficient than radiative charge transfer at energies above about 25 eV.