title: Performance measurement of the scintillator with optical fiber detector for boron neutron capture therapy.
abstract: The thermal neutron flux can be easily measured in real time by using the scintillator with optical fiber (SOF) detector. However the irradiation damage under high-intensity neutron flux causes deterioration of the SOF detector due to radiation damage to the plastic scintillator in which (6)LiF is blended. After irradiating the SOF detector for 4 h (thermal neutron fluence is approximately 2.0 x 10(13)neutrons/cm(2)), the sensitivity of the SOF detector decreased by 3.0%. After irradiating the SOF detector for 2 months (thermal neutron fluence approximately 6.4 x 10(14)neutrons/cm(2)), the sensitivity was reduced to 42% of baseline. Supposing that the thermal neutron fluence is 2 x 10(12)neutrons/cm(2) on the surface of a patient in a BNCT treatment, the sensitivity of the SOF detector is reduced by approximately 0.3%. This report presents investigations on the deterioration of the SOF detector in irradiation experiments.
authors.affiliation: Department of Research Reactor and Tandem Accelerator, Japan Atomic Energy Agency, Japan. komeda.masao@jaea.go.jp
authors.forename: M
authors.initials: M
authors.lastname: Komeda
authors.forename: H
authors.initials: H
authors.lastname: Kumada
authors.forename: M
authors.initials: M
authors.lastname: Ishikawa
authors.forename: T
authors.initials: T
authors.lastname: Nakamura
authors.forename: K
authors.initials: K
authors.lastname: Yamamoto
authors.forename: A
authors.initials: A
authors.lastname: Matsumura
mesh_terms: D016754:Boron Neutron Capture Therapy / Q000295:instrumentation* / Q000706:statistics & numerical data; D005214:Fast Neutrons; D006801:Humans; D007564:Japan; D009688:Nuclear Reactors; D055100:Optical Fibers / Q000706:statistics & numerical data; D019047:Phantoms, Imaging; D011874:Radiometry / Q000295:instrumentation* / Q000706:statistics & numerical data; D012680:Sensitivity and Specificity; D014867:Water
chemical_list: D014867:Water