  We construct the velocity map images of the proton transfer reaction between
helium and molecular hydrogen ions H2+. We perform simulations of imaging
experiments at one representative total collision energy taking into account
the inherent aberrations of the velocity mapping in order to explore the
feasibility of direct comparisons between theory and future experiments planned
in our laboratory. The asymptotic angular distributions of the fragments in a
3D velocity space is determined from the quantum state-to-state differential
reactive cross sections and reaction probabilities which are computed by using
the time-independent coupled channel hyperspherical coordinate method. The
calculations employ an earlier ab initio potential energy surface computed at
the FCI/cc-pVQZ level of theory. The present simulations indicate that the
planned experiments would be selective enough to differentiate between product
distributions resulting from different initial internal states of the
reactants.
