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Galactic Cosmic Ray Composition and Energy Spectra

Mewaldt, R. A. (1994) Galactic Cosmic Ray Composition and Energy Spectra. Advances in Space Research, 14 (10). pp. 737-740. ISSN 0273-1177. doi:10.1016/0273-1177(94)90536-3.

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Galactic cosmic ray nuclei represent a significant risk to long-duration spaceflight outside the magnetosphere. We review briefly existing measurements of the composition and energy spectra of heavy cosmic ray nuclei, pointing out which species and energy ranges are most critical to assessing cosmic ray risks for spaceflight. Key data sets are identified and a table of cosmic ray abundances is presented for elements from H to Ni (Z = 1 to 28). Because of the 22-year nature of the solar modulation cycle, data from the approaching 1998 solar minimum is especially important to reducing uncertainties in the cosmic ray radiation hazard. It is recommended that efforts to model this hazard take advantage of approaches that have been developed to model the astrophysical aspects of cosmic rays.

Item Type:Article
Related URLs:
URLURL TypeDescription
Mewaldt, R. A.0000-0003-2178-9111
Additional Information:Copyright © 1994 COSPAR. This work was supported in part by NASA under NAS5-722 and NAGW-1919. I appreciate the use of unpublished Mt. Washington Neutron Monitor data provided by J. LaBonte and J. Lockwood. A. C. Cummings, T. L. Garrard, and T. Rope made important contributions to the figures. I thank L. Townsend and P. Shea for their encouragement and patience, and J. H. Adams for helpful conversations on several of the topics discussed here.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Non-Subject Keywords:Energy Spectra, Galactic Cosmic Rays, Manned Space Flight, Radiation Hazards, Environment Models, Light Elements, Radiation Shielding, Relative Biological Effectiveness (Rbe)
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1993-05
Issue or Number:10
Record Number:CaltechAUTHORS:20140516-102632623
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45797
Deposited By: Deborah Miles
Deposited On:28 May 2014 16:21
Last Modified:10 Nov 2021 17:16

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