Neutron capture and (n,2n) measurements on 241Am

We report on a set of neutron-induced reaction measurements on 241Am which are important for nuclear forensics and advanced nuclear reactor design. Neutron capture measurements have been performed on the DANCE detector array at the Los Alamos Neutron Scattering Center (LANSCE). In general, good agreement is found with the most recent data evaluations up to an incident neutron energy of ~300 keV where background limits the measurement. Using mono-energetic neutrons produced in the 2H(d,n)3He reaction at the Triangle Universities Nuclear Laboratory (TUNL), we have measured the 241Am(n,2n) excitation function from 7.6 to 14.5 MeV using the activation method. Good agreement is found with previous measurements, with the exception of the three data points reported by Perdikakis et al. around 11 MeV, where we obtain a much lower cross section that is more consistent with theoretical estimates