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Published 1990 | Version Published
Book Section - Chapter Open

Cosmic Ray Source Abundances Derived from High Energy Measurements of Fe-Group Nuclei

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Abstract

We examine the cosmic ray source composition of elements from Ar to Ni (18≤ Z≤28) using data from ~0.l to ~200 GeV /nuc and a cosmic ray propagation code that includes improved fragmentation cross-sections. By fitting available satellite data over more than three decades in energy /nuc, including recent HEA0-3 data, we obtain improved source abundances for Ar, Ca, Cr, Mn, and Ni, and compare these with recent determinations of the solar composition. We find no evidence for an energy-dependent source composition below ~20 GeV/nuc, but the data at higher energies deserve further study.

Additional Information

© Organizing Committee of the 21st Int. Cosmic Ray Conference. Provided by the NASA Astrophysics Data System. This work was supported by NASA grants NAG8-678 and NCR 05-002-160. We appreciate discussions of HEAO data with W. R. Binns, T. L. Garrard, J. Klarmann, and C. J. Waddington, and help with the propagation code from B. T. Hayes.

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47199
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CaltechAUTHORS:20140714-162316365

Related works

Describes
http://adslabs.org/adsabs/abs/1990ICRC....3..432M/ (URL)

Funding

NASA
NAG8-678
NASA
NCR 05-002-160

Dates

Created
2014-07-15
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Updated
2019-11-22
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Space Radiation Laboratory
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Space Radiation Laboratory
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1989-23