Abstract
The diffusion length of thermal neutrons in water has been measured at various temperatures between 18 and 255 °C, the source being 124 Sb-Be (25 keV). Diffusion length measurements were also made in water with three boric acid concentrations and with water poisoned with a cadmium sulphate solution, the measurements being taken over a temperature range of 18 to 200 °C. The variation with temperature of the diffusion coefficient of water was determined from the experiments with poisoned water. A value 0.324 + 0.006 barn was obtained for the 2200 m/s microscopic absorption cross section of hydrogen. Close agreement was found between the experimental results and theoretical predictions based on the Nelkin model for slow neutron scattering.
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Schedule a callMore From: Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
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