SHIELDING AGAINST THE NEUTRONS PRODUCED WHEN 400-MeV ELECTRONS ARE INCIDENT ON A THICK COPPER TARGET

摘要

Neutron-transport calculations have been carried out using the method of discrete ordinates, and the dose equivalent as a function of radius in spherical shields of various compositions is presented. The incident-neutron spectra used are characteristic of the spectra emitted in the angular intervals of 0 to 30°, 30 to 60°, 60 to 120°, and 120 to 180° when 400-MeV electrons are incident on a thick copper target. Results are given for shields of soil, concrete, ilmenite, iron, and iron followed by soil.