Recently, comparison of the formalism defined in eqn (4) to experimentally measured β values in near-threshold CN -detachment demonstrated the importance of exit-channel interactions between the emitted electron and CN dipole (1.45 Debye in the X 2   state), at least for detachment from a σ-type orbital. Given the similar dipole moment of SO (1.55 Debye in the X 3   state), it should be expected that such interactions are also important in SO  .