Coupled-channel evaluations of cross sections for scattering involving   particle-unstable resonances
  How does the scattering cross section change when the colliding bound-state fragments are allowed particle-emitting resonances? This question is explored in the framework of a multi-channel algebraic scattering method of determining nucleon-nucleus cross sections at low energies. Two cases are examined, the first being a gedanken investigation in which n + carbon-12 scattering is studied with the target states assigned artificial widths. The second is a study of neutron scattering from beryllium-8; a nucleus that is particle unstable. Resonance character of the target states markedly varies evaluated cross sections from those obtained assuming stability in the target spectrum. 
P. Fraser, K. Amos, L. Canton, G. Pisent, S. Karataglidis, J. P.   Svenne, D. van der Knijff