Left/right capture asymmetry in He²⁺-Na(3p_-1) collisions: classical versus quantal collision dynamics

Abstract

Differential collision results based on classical (CTMC) and quantal (AOCC) calculations for single-electron capture in collisions of He 2+ projectiles with oriented Na(3p −1 ) atoms are compared at three intermediate impact energies (velocities of 0.45, 0.86 and 1.21 au). Good agreement between the two methods is reported with respect to the total capture probability, differential cross section and left/right scattering asymmetry. The polarization interaction with the target is so strong that the repulsive scattering in the final capture channels is seen only at the highest energy as a direct correspondence of left-/right-hand side trajectory results and left-/right-hand side scattering results. State-to-level and state-to-state capture results reveal differences between the predictions of classical and quantal methods.

Single ionization and electron capture in He2++Na collisions

“…Transverse momentum distributions or differential cross sections (DCS) are extracted from the recoil spectra for capture into the n = 3 and n = 4 shells. Although DCS in p+Na(3s, 3p) ( [39] and reference therein) and in Li + +Na(3s, 3p) ( [26] and reference therein) collisions have been studied intensively, for the present collision system only DCS in He 2+ +Na(3p −1 ) have been studied theoretically with CTMC and atomic orbitals calculations by Dubois et al [40]. To our knowledge for the present collision system experimental DCS have not been reported.…”