In the case of Feshbach (or Fano) type resonances, substantial mixing occurs between the bound wavefunctions of one electronic state with the wavefunctions for the continuum. This is an example of breakdown of the BOA. The bound rotational levels of one electronic state are embedded in a continuum of a state (or states) correlating to a lower dissociation asymptote. The excess (kinetic) energy on fragmentation arises from the energy gap between the bound level and the lower dissociation asymptote, as occurs in SiH+ [52].