title: INVESTIGATION OF THE INFLUENCE OF THE POSITION INSIDE A SMALL AIRCRAFT ON THE COSMIC-RADIATION-INDUCED DOSE.
abstract: This article report the measurements on-board a small aircraft at the same altitude and around the same geographic coordinates. The measurements of Ambient Dose Equivalent Rate (H*(10)) were performed in several positions inside the aircraft, close and far from the pilot location and the discrimination between neutron and non-neutron components. The results show that the neutrons are attenuated close to fuel depots and the non-neutron component appears to have the opposite behavior inside the aircraft. These experimental results are also confronted with results from Monte Carlo simulation, obtained with the MCNPX code, using a simplified model of the Learjet-type aircraft and a modeling of the standard atmosphere, which reproduces the real energy and angular distribution of the particles. The Monte Carlo simulation agreed with the experimental measurements and shows that the total H*(10) presents small variation (around 1%) between the positions inside aircraft, although the neutron spectra present significant variations.
authors.affiliation: Institute for Advanced Studies, São José dos Campos, SP, Brazil.|Aeronautics Technological Institute, São José dos Campos, SP, Brazil.
authors.forename: A C M
authors.initials: ACM
authors.lastname: Prado
authors.affiliation: Federal University of Health Sciences of Porto Alegre, Porto Alegre, RS, Brazil.
authors.forename: M T
authors.initials: MT
authors.lastname: Pazianotto
authors.affiliation: Institute for Advanced Studies, São José dos Campos, SP, Brazil.|Aeronautics Technological Institute, São José dos Campos, SP, Brazil.
authors.forename: O L
authors.initials: OL
authors.lastname: Gonçalez
authors.affiliation: Aeronautics Technological Institute, São José dos Campos, SP, Brazil.
authors.forename: L R
authors.initials: LR
authors.lastname: Dos Santos
authors.affiliation: Institute for Advanced Studies, São José dos Campos, SP, Brazil.
authors.forename: A D
authors.initials: AD
authors.lastname: Caldeira
authors.affiliation: Institute for Advanced Studies, São José dos Campos, SP, Brazil.
authors.forename: H H C
authors.initials: HHC
authors.lastname: Pereira
authors.affiliation: Office National d'Etudes et de Recherches Aéronautiques, Toulouse, France.
authors.forename: G
authors.initials: G
authors.lastname: Hubert
authors.affiliation: Institute for Advanced Studies, São José dos Campos, SP, Brazil.|Aeronautics Technological Institute, São José dos Campos, SP, Brazil.
authors.forename: C A
authors.initials: CA
authors.lastname: Federico
mesh_terms: D000401:Aircraft; D000531:Altitude; D003198:Computer Simulation; D003359:Cosmic Radiation; D006801:Humans; D009010:Monte Carlo Method; D009502:Neutrons; D016273:Occupational Exposure / Q000032:analysis*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*