Thermalization of accelerator-produced neutrons in a concrete room.
We investigated a thermalization of neutrons, which were produced by an accelerator in a concrete room, by experiments and calculations. It was clarified that the widely used simple empirical formula phi th = c x Q/S, where Q is the neutron source intensity and S is the total surface area of a room, gives about one-third the underestimated value to our experimental and calculated results and the coefficient, c, is not a constant, but dependent on the source neutron energy.
Ishikawa
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Technical Research Institute, Fujita Corporation, Yokohama, Japan.
Sugita
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H
Nakamura
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D003252:Construction Materials; D005214:Fast Neutrons; D010315:Particle Accelerators; D011835:Radiation Protection; D012542:Scattering, Radiation