title: Measuring cosmic-ray exposure in aircraft using real-time personal dosemeters.
abstract: Aircrew exposure to radiation was measured on several long-haul flights using two small commercial electronic personal dosemeters: one was a photon dosemeter, the NRF20; the other was a neutron dosemeter, the NRY21-both manufactured by Fuji Electric Systems Co. Ltd. for radiation protection at nuclear facilities. Non-neutron doses were measured using the photon dosemeter, and neutron doses were measured using the neutron dosemeter. The measured non-neutron doses at commercial aviation altitudes agree with the EPCARD (European Program Package for the Calculation of Aviation Route Doses) dose calculation within a difference of 8 %. However, the recorded neutron doses were 5-15 times larger than the EPCARD calculation. These over-measurements are dependent on cut-off rigidities.
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: Tomoya
authors.initials: T
authors.lastname: Nunomiya
authors.forename: Takeshi
authors.initials: T
authors.lastname: Ishikura
authors.forename: Takashi
authors.initials: T
authors.lastname: Nakamura
authors.forename: Brent J
authors.initials: BJ
authors.lastname: Lewis
authors.forename: Les G I
authors.initials: LG
authors.lastname: Bennett
authors.forename: Ian L
authors.initials: IL
authors.lastname: Getley
authors.forename: B H
authors.initials: BH
authors.lastname: Bennett
mesh_terms: D000401:Aircraft; D003359:Cosmic Radiation; D006801:Humans; D009502:Neutrons; D016273:Occupational Exposure; D017785:Photons; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000379:methods*; D011835:Radiation Protection / Q000379:methods