title: Characterisation of radionuclides formed by high-energy neutron irradiation.
abstract: The physicochemical properties of radionuclides suspended in the air are important parameters in order to evaluate internal doses due to the inhalation of the airborne radionuclides and to develop the air-monitoring system in high-energy proton accelerator facilities. This study focuses on the property of radioactive airborne chlorine (38Cl and 39Cl) and sulphur (38S) produced in Ar gas by irradiation with high-energy neutrons. As a result of the irradiation of a mixture of Ar gas and dry air, 38Cl and 39Cl existed as non-acidic gas and 38S was present as acidic gas. Furthermore, it has been found that in the high-energy neutron irradiation of aerosol containing Ar gas, the higher the amount of radioactive aerosols, the lower will be the amount of radioactive acidic gas.
authors.affiliation: Tokai Research Establishment, Japan Atomic Energy Research Institute, 2-4 Shirane, Shirakata, Tokai-mura, Ibaraki 319-1195, Japan. sumi@popsvr.tokai.jaeri.go.jp
authors.forename: Sumi
authors.initials: S
authors.lastname: Yokoyama
authors.forename: Kaoru
authors.initials: K
authors.lastname: Sato
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Noguchi
authors.forename: Susumu
authors.initials: S
authors.lastname: Tanaka
authors.forename: Takao
authors.initials: T
authors.lastname: Iida
authors.forename: Shinya
authors.initials: S
authors.lastname: Furuichi
authors.forename: Yukio
authors.initials: Y
authors.lastname: Kanda
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Oki
authors.forename: Taihei
authors.initials: T
authors.lastname: Kaneto
mesh_terms: D000336:Aerosols / Q000032:analysis*; D001128:Argon / Q000737:chemistry* / Q000528:radiation effects*; D002713:Chlorine / Q000032:analysis*; D005214:Fast Neutrons; D018499:Linear Energy Transfer; D011868:Radioisotopes / Q000032:analysis*; D011874:Radiometry / Q000379:methods; D013455:Sulfur / Q000032:analysis*
chemical_list: D000336:Aerosols; D011868:Radioisotopes; D002713:Chlorine; D001128:Argon; D013455:Sulfur