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Effects of Nuclear Cross Sections at Different Energies on the Radiation Hazard from Galactic Cosmic RaysThe radiation hazard for astronauts from galactic cosmic rays is a major obstacle in long duration human space explorations. Space radiation transport codes have been developed to calculate radiation environment on missions to the Moon, Mars or beyond. We have studied how uncertainties in fragmentation cross sections at different energies affect the accuracy of predictions from such radiation transport. We find that, in deep space, cross sections between 0.3 and 0.85 GeV/u usually have the largest effect on dose-equivalent behind shielding in solar minimum GCR environments, and cross sections between 0.85 and 1.2 GeV/u have the largest effect in solar maximum GCR environments. At the International Space Station, cross sections at higher energies have the largest effect due to the geomagnetic cutoff.
Document ID
20060048243
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Lin, Z. W.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Adams, J. H., Jr.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2006
Subject Category
Space Radiation
Meeting Information
Meeting: 36th COSPAR Scientific Assembly
Location: Beijing
Country: China
Start Date: July 16, 2006
End Date: July 23, 2006
Sponsors: Committee on Space Research
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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