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Dose calculations at high altitudes and in deep space with GEANT4 using BIC and JQMD models for nucleus–nucleus reactions

Sihver, L. and Matthiä, Daniel and Koi, T. and Mancusi, D. (2008) Dose calculations at high altitudes and in deep space with GEANT4 using BIC and JQMD models for nucleus–nucleus reactions. New Journal of Physics (The open-access journal for physics), 10 (online) (105019 (online)), p. 19. Deutsche Physikalische Gesellschaft & Institute of Physics. DOI: 10.1088/1367-2630/10/10/105019

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Abstract

Radiation exposure of aircrew is more and more recognized as an occupational hazard. The ionizing environment at standard commercial aircraft flight altitudes consists mainly of secondary particles, of which the neutrons give a major contribution to the dose equivalent. Accurate estimations of neutron spectra in the atmosphere are therefore essential for correct calculations of aircrew doses. Energetic solar particle events (SPE) could also lead to significantly increased dose rates, especially at routes close to the North Pole, e.g. for flights between Europe and USA. It is also well known that the radiation environment encountered by personnel aboard low Earth orbit (LEO) spacecraft or aboard a spacecraft traveling outside the Earth's protective magnetosphere is much harsher compared with that within the atmosphere since the personnel are exposed to radiation from both galactic cosmic rays (GCR) and SPE. The relative contribution to the dose from GCR when traveling outside the Earth's magnetosphere, e.g. to the Moon or Mars, is even greater, and reliable and accurate particle and heavy ion transport codes are essential to calculate the radiation risks for both aircrew and personnel on spacecraft. We have therefore performed calculations of neutron distributions in the atmosphere, total dose equivalents, and quality factors at different depths in a water sphere in an imaginary spacecraft during solar minimum in a geosynchronous orbit. The calculations were performed with the GEANT4 Monte Carlo (MC) code using both the binary cascade (BIC) model, which is part of the standard GEANT4 package, and the JQMD model, which is used in the particle and heavy ion transport code PHITS GEANT4.

Item URL in elib:https://elib.dlr.de/60625/
Document Type:Article
Title:Dose calculations at high altitudes and in deep space with GEANT4 using BIC and JQMD models for nucleus–nucleus reactions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sihver, L.Chalmers University of Technology, Gothenburg, Sweden; Roanoke College, Salem, VA, USAUNSPECIFIED
Matthiä, DanielUNSPECIFIEDUNSPECIFIED
Koi, T.SLAC, Stanford, CA, USAUNSPECIFIED
Mancusi, D.Chalmers University of Technology, Gothenburg, SwedenUNSPECIFIED
Date:2008
Journal or Publication Title:New Journal of Physics (The open-access journal for physics)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:No
In ISI Web of Science:Yes
Volume:10 (online)
DOI :10.1088/1367-2630/10/10/105019
Page Range:p. 19
Publisher:Deutsche Physikalische Gesellschaft & Institute of Physics
Status:Published
Keywords:Radiation exposure of aircrew, calculations of aircrew doses, radiation risks for personnel on spacecraft, GEANT4 Monte Carlo (MC) code
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Strahlenbiologie (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:01 Dec 2009 13:26
Last Modified:01 Dec 2009 13:26

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