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We report on electron removal calculations for 2.81 keV/amu Li$^{3+}$ andO$^{3+}$ ion collisions with neon dimers. The target is described as twoindependent neon atoms fixed at the dimer's equilibrium bond length, whoseelectrons are subjected to the time-dependent bare and screened Coulombpotentials of the classically moving Li$^{3+}$ and O$^{3+}$ projectile ions,respectively. Three mutually perpendicular orientations of the dimer withrespect to the rectilinear projectile trajectories are considered and collisionevents for the two ion-atom subsystems are combined in an impact parameter byimpact parameter fashion and are orientation-averaged to calculateprobabilities and cross sections for the ion-dimer system. The coupled-channeltwo-center basis generator method is used to solve the ion-atom collisionproblems. We concentrate the ion-dimer analysis on one-electron andtwo-electron removal processes which can be associated with interatomic Coulombdecay, Coulomb explosion, and radiative charge transfer. We find that thecalculated relative yields are in fair agreement with recent experimental datafor O$^{3+}$-Ne$_2$ collisions if we represent the projectile by a screenedCoulomb potential, but disagree markedly for a bare Coulomb potential, i.e.,for Li$^{3+}$ impact. In particular, our calculations suggest that interatomicCoulomb decay is a significant reaction channel in the former case only, sincecapture of a Ne($2s$) electron to form hydrogenlike Li$^{2+}$ is unlikely.

physical review. a/physical review, a

Independent-atom-model coupled-channel calculations strengthen the case  for interatomic Coulomb decay as a subdominant reaction channel in slow  O$^{3+}$-Ne$_2$ collisions