Low energy nuclear scattering and sub-threshold spectra from a   multi-channel algebraic scattering theory
  A multi-channel algebraic scattering theory, to find solutions of coupled-channel scattering problems with interactions determined by collective models, has been structured to ensure that the Pauli principle is not violated. Positive (scattering) and negative (sub-threshold) solutions can be found to predict both the compound nucleus sub-threshold spectrum and all resonances due to coupled channel effects that occur on a smooth energy varying background. 
K. Amos, P. Fraser, S. Karataglidis, D. van der Knijff, J. P Svenne,   L. Canton, G. Pisent