The heteronuclear rare gas ions

We develop a simple model for the calculation of the splitting between molecular states of the heteronuclear rare gas ions. Making use of available experimental data we determine the potential curves themselves. The accuracy is estimated to be sufficient to aid the interpretation of collision experiments. Further, our results suggest a new assignment of the already observed charge exchange transitions. The relative energy positions of the potentials should be reliable enough to predict the transition energies of the so far unobserved bands within a few meV.