title: The improvement of the energy resolution in epi-thermal neutron region of Bonner sphere using boric acid water solution moderator.
abstract: Bonner sphere is useful to evaluate the neutron spectrum in detail. We are improving the energy resolution in epi-thermal neutron region of Bonner sphere, using boric acid water solution as a moderator. Its response function peak is narrower than that for polyethylene moderator and the improvement of the resolution is expected. The resolutions between polyethylene moderator and boric acid water solution moderator were compared by simulation calculation. Also the influence in the uncertainty of Bonner sphere configuration to spectrum estimation was simulated.
authors.affiliation: Graduate School of Engineering, Kyoto University, Kyoto daigaku-Katsura, Nishikyo-ku, Kyoto 615-8530, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ueda
authors.affiliation: Research Reactor Institute, Kyoto University, Asashiro-nishi 2-1010, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Tanaka
authors.affiliation: Research Reactor Institute, Kyoto University, Asashiro-nishi 2-1010, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan. Electronic address: yosakura@rri.kyoto-u.ac.jp.
authors.forename: Y
authors.initials: Y
authors.lastname: Sakurai
mesh_terms: D065638:Absorption, Radiation; D001888:Boric Acids / Q000737:chemistry* / Q000528:radiation effects*; D016754:Boron Neutron Capture Therapy / Q000295:instrumentation*; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008956:Models, Chemical; D009502:Neutrons; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012996:Solutions; D014867:Water / Q000737:chemistry
chemical_list: D001888:Boric Acids; D012996:Solutions; D014867:Water; C032688:boric acid
keywords: Activation detector; Bonner sphere; Boron neutron capture therapy; Neutron spectrometry; Spectrum unfolding; Thermal neutron absorber