Abstract

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 argular intervals of 0 to 30 deg , 30 to 60 deg , 60 to 120 deg , and 120 to l80 deg 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. (auth)

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