NEUTRON DIFFUSION IN WATER CONTAINING 1-V AND NON-1-V ABSORBERS

Some results of a detailed study of neutron diffusion in water containing 1/v and non-1/v absorbers are reported. The computed values of the diffusion length in water poisoned with various concentrations of boron are consistent with the experimental results of Martinho and Costa Paiva. For non-1/v absorbers - cadmium and gadolinium solutions - calculations on space-dependent neutron spectra are reported. The calculated values of K//0**2(equivalent 1/L**2) for various concentrations of cadmium and gadolinium are in good agreement with the experimental data of Goddard and Johnson. For high concentrations of cadmium, notable differences are observed between the present calculations and those based on the Nelkin kernel.