title: Thermalization of accelerator-produced neutrons in a concrete room.
abstract: 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.
authors.affiliation: Technical Research Institute, Fujita Corporation, Yokohama, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ishikawa
authors.forename: H
authors.initials: H
authors.lastname: Sugita
authors.forename: T
authors.initials: T
authors.lastname: Nakamura
mesh_terms: D003252:Construction Materials; D005214:Fast Neutrons; D010315:Particle Accelerators; D011835:Radiation Protection; D012542:Scattering, Radiation