CaltechAUTHORS
Published September 15, 2000 | Version Published
Book Section - Chapter Open

Secondary Electron-Capture-Decay Isotopes and Implications for the Propagation of Galactic Cosmic rays

Creators

  • 1. ROR icon Washington University in St. Louis
  • 2. ROR icon Goddard Space Flight Center
  • 3. ROR icon California Institute of Technology
  • 4. ROR icon Jet Propulsion Lab

Contributors

Abstract

We report the first observation of an energy dependence in the titanium, vanadium, and chromium isotopic abundances in cosmic rays. The observations were made in the 100–500 MeV/nucleon energy interval using data from the Cosmic Ray Isotope Spectrometer on the ACE spacecraft. The ^(51)Cr and ^(49)V isotopes in cosmic rays are produced by fragmentation of heavier cosmic ray nuclides and decay only by electron capture. The observations indicate that electron-capture decay occurred primarily at the lower energies measured, and that there is a resulting energy dependence in the abundances of these isotopes and their decay products.

Additional Information

© 2000 American Institute of Physics. Published online 15 September 2000. This research was supported by the National Aeronautics and Space Administration at the California Institute of Technology (under grant NAG5-6912), the Goddard Space Flight Center, the Jet Propulsion Laboratory, and Washington University.

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Published - 2000-31.pdf

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2000-31.pdf

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Additional details

Identifiers

Eprint ID
55017
Resolver ID
CaltechAUTHORS:20150219-131410930

Funding

NASA
NAG5-6912

Dates

Created
2015-02-23
Created from EPrint's datestamp field
Updated
2021-11-10
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Caltech Custom Metadata

Caltech groups
Space Radiation Laboratory , Physics Department
Series Name
AIP Conference Proceedings
Series Volume or Issue Number
528
Other Numbering System Name
Space Radiation Laboratory
Other Numbering System Identifier
2000-31