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Solar modulation and nuclear fragmentation effects in galactic cosmic ray transport through shieldingCrews of manned interplanetary missions may accumulate significant radiation exposures from the Galactic Cosmic Ray (GCR) environment in space. Estimates of how these dose levels are affected by the assumed temporal and spatial variations in the composition of the GCR environment, and by the effects of the spacecraft and body self-shielding on the transported fields are presented. In this work, the physical processes through which shielding alters the transported radiation fields are described. We then present estimates of the effects on model calculations of (1) nuclear fragmentation model uncertainties, (2) solar modulation, (3) variations between solar cycles, and (4) proposed changes to the quality factors which relate dose equivalent to absorbed dose.
Document ID
19940039121
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Townsend, L. W.
(NASA Langley Research Center Hampton, VA, USA, United States)
Cucinotta, C. F.
(NASA Langley Research Center Hampton, VA, USA, United States)
Wilson, J. W.
(NASA Langley Research Center Hampton, VA, USA, United States)
Shinn, J. L.
(NASA Langley Research Center Hampton, VA, USA, United States)
Badhwar, G.
(NASA Johnson Space Center Houston, TX, USA, United States)
Date Acquired
August 16, 2013
Publication Date
October 1, 1994
Publication Information
Publication: Life Sciences and Space Research 25 (2) Radiation Biology: Topical Meeting of the COSPAR Interdisciplinary Scientific Commission F of the COSPAR 29th Plenary Meeting, Washington, DC, Aug. 28-Sep. 5, 1
Volume: 14
Issue: 10
ISSN: 0273-1177
Subject Category
Space Radiation
Accession Number
94A62570
Distribution Limits
Public
Copyright
Other

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