Measuring Spectral Indices in a Critical Cylindrical Uranium System with a Lithium Hydride End Reflector

The results of precision experiments concerning neutron passage through the layers of lithium-7 hydride are reported. Activation integrals for neutron activation detectors positioned at various points of the composite lithium-7 hydride reflector mounted at the end of the uranium breeder system have been determined. Spectral indices have been calculated on the basis of the data obtained.