Published 2001
| public
Journal Article
The isotopic source composition of cosmic-ray iron, cobalt, and nickel
Abstract
The isotopic composition of cosmic-ray Fe, Co, and Ni at energies ∼150–500 MeV/nucleon has been measured with the Cosmic-Ray Isotope Spectrometer (CRIS) instrument on ACE. Source abundances have been derived from a leaky-box propagation model using secondary species in the range 41 ≤ A ≤ 55 to constrain the calculated secondary contributions to the Fe, Co, and Ni isotopes. The derived relative source abundances bear a strong resemblance to solar-system values. The most significant difference, an excess of ∼ (70 ± 30)%, is found for the source abundance ratio ^(58)Fe/^(56)Fe. Some implications of the derived source composition for the origin of cosmic rays are discussed.
Additional Information
© 2001 COSPAR. Published by Elsevier Science Ltd. Available online 3 August 2001. This research was supported by the National Aeronautics and Space Administration at the California Institute of Technology (under grant NAG5-6912), the Jet Propulsion Laboratory, NASA's Goddard Space Flight Center, and Washington University.Additional details
- Eprint ID
- 48913
- Resolver ID
- CaltechAUTHORS:20140826-112434005
- NAG5-6912
- NASA
- NASA/JPL/Caltech
- Goddard Space Flight Center
- Washington University
- Created
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2014-08-26Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Space Radiation Laboratory
- Other Numbering System Name
- Space Radiation Laboratory
- Other Numbering System Identifier
- 1999-28