title: Measured proton sensitivities of bubble detectors.
abstract: The neutron dose equivalent in aircraft is measured using commercial bubble detectors, but at high altitudes there are not only neutrons but also protons. Bubble detectors have been used because they are considered not to be sensitive to protons, but this has been the subject of only a few studies. In this study, by irradiating bubble detectors with energetic protons, the detectors' responses to protons were observed. Bubbles were clearly formed by protons, but the proton sensitivities were one order of magnitude smaller than the neutron sensitivities. Thus, counts of protons can be ignored in neutron measurements in aircraft.
authors.affiliation: National Institute of Radiological Sciences, Chiba 263-8555, Japan. m_takada@nirs.go.jp
authors.forename: Masashi
authors.initials: M
authors.lastname: Takada
authors.forename: Hisashi
authors.initials: H
authors.lastname: Kitamura
authors.forename: Tatsumi
authors.initials: T
authors.lastname: Koi
authors.forename: Takashi
authors.initials: T
authors.lastname: Nakamura
authors.forename: Kazunobu
authors.initials: K
authors.lastname: Fujitaka
mesh_terms: D000337:Aerospace Medicine / Q000295:instrumentation* / Q000379:methods; D000531:Altitude; D003359:Cosmic Radiation; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000379:methods*; D009502:Neutrons; D011522:Protons; D011828:Radiation Chimera; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D018570:Risk Assessment; D012680:Sensitivity and Specificity
chemical_list: D011522:Protons