Fig. 2. One-dimensional cuts of the PESs of the three ²A′ states of the [NH₃Rg]⁺ complexes relevant to the charge transfer process, as a function of the distance R between the Rg⁺ ion and the centre of mass of NH₃. Solid lines correspond to the ground state PESs dissociating into NH₃⁺ + Rg(²S); dashed and dotted lines correspond to the excited state PESs dissociating into NH₃ + Rg⁺(²P). The zero of energy is set at the entrance channel, NH₃ + Rg⁺(²P). The angles are θ = π and ϕ = 0, corresponding to the Rg⁺ ion approaching the N atom of NH₃ along the C₃ axis. The umbrella angle is fixed to the equilibrium value of NH₃, ρ = 112°.