title: An experimental study on radiation streaming through a labyrinth in a proton accelerator facility of intermediate energy.
abstract: A radiation streaming experiment has been carried out at the Takasaki Ion Accelerator Facility for Advanced Radiation Application at the Japan Atomic Energy Research Institute in a room housing a Cu target irradiated with 68 MeV protons and in a labyrinth of three-legs having a total length of 29 m. In the experiment, neutron and gamma ray energy spectra, neutron reaction rates, and neutron and gamma ray dose equivalent rates were measured using various counters and dosimeters. The experimental data show the applicability of some empirical formulas for estimating the thermal neutron flux in a room and neutrons streaming in a labyrinth designed for a proton accelerator operating in the intermediate energy region. The data suggest that it is mandatory to estimate the gamma ray dose equivalent rate in a labyrinth, which is dominated by the secondary gamma rays due to the neutron capture reaction.
authors.affiliation: Japan Atomic Energy Research Institute, Takasaki Establishment.
authors.forename: S
authors.initials: S
authors.lastname: Tanaka
authors.forename: H
authors.initials: H
authors.lastname: Nakashima
authors.forename: Y
authors.initials: Y
authors.lastname: Sakamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Nakane
authors.forename: S
authors.initials: S
authors.lastname: Meigo
authors.forename: S
authors.initials: S
authors.lastname: Tanaka
authors.forename: T
authors.initials: T
authors.lastname: Nakamura
authors.forename: M
authors.initials: M
authors.lastname: Takada
authors.forename: T
authors.initials: T
authors.lastname: Kurosawa
authors.forename: H
authors.initials: H
authors.lastname: Hirayama
authors.forename: N
authors.initials: N
authors.lastname: Nakao
authors.forename: Y
authors.initials: Y
authors.lastname: Uwamino
authors.forename: M
authors.initials: M
authors.lastname: Imamura
authors.forename: K
authors.initials: K
authors.lastname: Shin
mesh_terms: D000047:Academies and Institutes; D004867:Equipment Design; D005214:Fast Neutrons; D005720:Gamma Rays; D007564:Japan; D007700:Kinetics; D009502:Neutrons; D009678:Nuclear Energy; D010315:Particle Accelerators; D011210:Power Plants; D011522:Protons
chemical_list: D011522:Protons