555. 共鳴箔による中性子束の非等方成分の測定法

抄録

A new technique is developed to defermine the P₀ and P₁ components of the neutron flux in a slowing down energy region. The principle of the new technique is based on relating the activities induced on each of a set of three thin Au-foils arranged in sandwich to both of the components of the neutron flux expanded into Legendre polynomials. Applying the technique, the spatial distribution of an anisotropic source neutrons producing thermal neutrons in a light water tank of slab geometry was measured with fairly good accuracy. it is concluded from error estimations that this technique is validly applicable in general usage.