title: Development of neutron-monitor detector using liquid organic scintillator coupled with 6Li + ZnS(Ag) Sheet.
abstract: A phoswitch-type detector has been developed for monitoring neutron doses in high-energy accelerator facilities. The detector is composed of a liquid organic scintillator (BC501A) coupled with ZnS(Ag) sheets doped with 6Li. The dose from neutrons with energies above 1 MeV is evaluated from the light output spectrum of the BC501A by applying the G-function, which relates the spectrum to the neutron dose directly. The dose from lower energy neutrons, on the other hand, is estimated from the number of scintillations emitted from the ZnS(Ag) sheets. Characteristics of the phoswitch-type detector were studied experimentally in some neutron fields. It was found from the experiments that the detector has an excellent property of pulse-shape discrimination between the scintillations of BC501A and the ZnS(Ag) sheets. The experimental results also indicate that the detector is capable of reproducing doses from thermal neutrons as well as neutrons with energies from one to several tens of megaelectronvolts (MeV).
authors.affiliation: Japan Atomic Energy Research Institute (JAERI), Shirakata-Shirane 2-4, Tokai-mura, Naka-gun, Ibaraki, 319-1195, Japan. t.sato@popsvr.tokai.jaeri.go.jp
authors.forename: Tatsuhiko
authors.initials: T
authors.lastname: Sato
authors.forename: Akira
authors.initials: A
authors.lastname: Endo
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Yamaguchi
authors.forename: Fumiaki
authors.initials: F
authors.lastname: Takahashi
mesh_terms: D004781:Environmental Exposure / Q000032:analysis; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000379:methods; D007554:Isotopes / Q000528:radiation effects; D018499:Linear Energy Transfer; D008094:Lithium / Q000528:radiation effects; D009502:Neutrons; D016273:Occupational Exposure / Q000032:analysis*; D009930:Organic Chemicals / Q000528:radiation effects; D011829:Radiation Dosage; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods; D011868:Radioisotopes / Q000032:analysis*; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012588:Scintillation Counting / Q000379:methods*; D012680:Sensitivity and Specificity; D012996:Solutions; D013440:Sulfides / Q000528:radiation effects; D014159:Transducers; D017967:Zinc Compounds / Q000528:radiation effects
chemical_list: D007554:Isotopes; D009930:Organic Chemicals; D011868:Radioisotopes; D012996:Solutions; D013440:Sulfides; D017967:Zinc Compounds; D008094:Lithium; C031238:zinc sulfide