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The Effect of the Azimuthal Angle on Fast-Neutron Concrete Albedos

William H. Miller, Walter Meyer

Nuclear Science and Engineering / Volume 64 / Number 4 / December 1977 / Pages 886-889

Technical Note / dx.doi.org/10.13182/NSE77-A14506

Albedos have been experimentally measured for a spectrum of fast fission neutrons incident on a 24- × 24- × 9-in. concrete slab. The source of fast neutrons for the experimental studies was the Missouri University Research Reactor; the direct and reflected neutron spectra were detected using a 2- × 2-in. liquid-scintillation spectrometer system. Previously published Monte Carlo calculated albedos have indicated a weak dependence on the azimuthal angle of reflection. These experimental measurements have confirmed this result and identified the effect of the incident angle on this relationship.