Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published 1990 | Published
Book Section - Chapter Open

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

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.

Attached Files

Published - 1989-23.pdf

Files

1989-23.pdf
Files (371.9 kB)
Name Size Download all
md5:bbd9b1460a5f116945d856ebe9343125
371.9 kB Preview Download

Additional details

Created:
August 19, 2023
Modified:
October 26, 2023