Measurements of neutron thermalization parameters in light water by pulsed source and non 1/v absorber method

Measurements of thermalization parameters in light water have been made by the pulsed neutron source and non 1/v absorber method. In an effectively infinite system of poisoned water, an asymptotic decay constant was measured by detecting capture γ-rays emitted from the whole volume of this system. The thermalization parameters were derived from values of decay constants measured over a wide range of non 1/v absorber concentration. Measured values of these parameters were compared with values calculated from Nelkin Egelstaff-Schofield and McMurry-Russell kernels. (author)