Calculated Perturbations in Threshold Foil Measurements Due to Neutron Interactions in B4C Shells

摘要

Calculations were made to determine expected perturbation effects to the measured neutron flux in B4C shielded threshold foils resulting from neutron interactions in the B4C. Results indicated that there is a significant increase in the measured flux below the source energy of monoenergetic neutron beams due to scattering.nThe activities in a series of threshold foils encased within a B4C shell were calculated for exposure of the shell to monoenergetic 13.57- and 1.01-MeV neutron beams incident at 0° with respect to the shell axis.