In-beam gamma-ray spectrometric measurements of multi-body breakup reactions for E{sub n} between threshold and 40 MeV

A system for in-beam gamma-ray spectrometric measurements to study inelastic neutron scattering has been extended to increasing incident neutron energies to study multi-body breakup reactions on light and medium-weight elements. The (n,2n{gamma}) cross sections are generally the largest; however, reactions of the types (n,{alpha}{gamma}), (n,np{gamma}) and (n,3n{gamma}) have been observed. In addition to improved understanding of reaction channels studied by other techniques, this method provides data for some reactions, e.g. {sup 56}Fe(n,3n){sup 54}Fe, which have not been observed previously