Abstract
For the determination of the thermal neutron diffusion coefficient for samples of limited size, it is proposed to use the neutron wave or pulse propagation method. A thin slab of the material under investigation is then placed between two blocks of a medium with known properties. Numerical calculations have been performed on such a system. It is found that, for a certain frequency and some specified conditions, the phase shift in the outer medium will be the same as if the sample had the same properties as the outer medium. This fact may be used for a measurement of the diffusion coefficient of the sample.
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