COMPARATIVE RESEARCH ON TOPOLOGIES OF CONTRA-ROTATING MOTORS FOR UNDERWATER VEHICLES





Analytical method for calculating the efficiencies of a randomly located point source and an ovoid shape detector

In this paper, we present a straightforward analytical method for calculating the efficiencies of an ovoid shape (elliptical cylindrical) detector by using a randomly located point source.To determine the activity of an unknown radioactive source, Belts absolute efficiency is required and we should take into account the attenuation of the gamma-ray

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