Abstract
In this research project, the thermal neutron reflection coefficient has been measured (albedo ath) for different combinations of reflector materials for several thicknesses by using 3.0 Curie Americium Beryllium (Am-241-Be-9) neutron source and a BF3 detector. The maximum value of neutron reflection from paraffin has been measured as 0.734 +/- 0.020 appropriate to the value 0.83 mentioned in the literature. The reflection of neutrons has been measured for two-layered medium i.e. copper-aluminum, copper-wood, wood-paraffin, and paraffin-iron of various thickness in a horizontal arrangement. MATLAB has been used for the analytical simulation by devolving pseudocode that solves the diffusion equations in two different mediums. It has been observed that the reflection coefficient increases exponentially by introducing a 2nd layer, only if the 2nd medium has less diffusion length and higher diffusion coefficient. The experimental results have been found in concord with analytical results. Poisson distribution has been used for uncertainties analysis.