| Description of transport codes for space radiation shielding. | |
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MedLine Citation:
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PMID: 23032892 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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ABSTRACT: Exposure to ionizing radiation in the space environment is one of the hazards faced by crews in space missions. As space radiations traverse spacecraft, habitat shielding, or tissues, their energies and compositions are altered by interactions with the shielding. Modifications to the radiation fields arise from atomic interactions of charged particles with orbital electrons and nuclear interactions leading to projectile and target fragmentation, including secondary particles such as neutrons, protons, mesons, and nuclear recoils. The transport of space radiation through shielding can be simulated using Monte Carlo techniques or deterministic solutions of the Boltzmann equation. To determine shielding requirements and to resolve radiation constraints for future human missions, the shielding evaluation of a spacecraft concept is required as an early step in the design process. To do this requires (1) accurate knowledge of space environmental models to define the boundary condition for transport calculations, (2) transport codes with detailed shielding and body geometry models to determine particle transmission into areas of internal shielding and at each critical body organ, and (3) the assessment of organ dosimetric quantities and biological risks by applying the corresponding response models for space radiation against the particle spectra that have been accurately determined from the transport code. This paper reviews current transport codes and analyzes their accuracy through comparison to laboratory and spaceflight data. This paper also introduces a probabilistic risk assessment approach for the evaluation of radiation shielding. |
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Authors:
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Myung-Hee Y Kim; John W Wilson; Francis A Cucinotta |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Health physics Volume: 103 ISSN: 1538-5159 ISO Abbreviation: Health Phys Publication Date: 2012 Nov |
Date Detail:
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Created Date: 2012-10-03 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985093R Medline TA: Health Phys Country: United States |
Other Details:
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Languages: eng Pagination: 621-39 Citation Subset: IM |
Affiliation:
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*Division of Space Life Sciences, Universities Space Research Association, Houston, TX 77058; †Distinguished Research Associates, NASA Langley Research Center, Hampton, VA 23681; ‡Space Radiation Program, NASA Johnson Space Center, Houston, TX 77058. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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