Abstract
Consider the following geometrical configuration. Neutrons emanating from an isotropic point source hit a circular target. The secondary particles produced are counted by a circular detector. The planes of the radiator and the detector are both perpendicular to the line through their centers and through the point source. In this article the resulting total and differential detection efficiencies are investigated for different types of angular emission distributions of the secondary particles. Both infinitely thin radiators and radiators of finite thickness are considered. Numerical results have been obtained for different values of the radiator thickness, radiator diameter, detector diameter, target-detector distance and target-neutron source distance.
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