CaltechAUTHORS
Published March 2001 | Version Published
Book Section - Chapter Open

The cosmic-ray contribution to galactic abundances of the light elements: Interpretation of GCR LiBeB abundance measurements from ACE/CRIS

Creators

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

Contributors

Abstract

Inelastic collisions between the galactic cosmic rays (GCRs) and the interstellar medium (ISM) are responsible for producing essentially all of the light elements Li, Be, and B (LiBeB) observed in the cosmic rays. Previous calculations (e.g., [1]) have shown that GCR fragmentation can explain the bulk of the existing LiBeB abundance in the present day Galaxy. However, elemental abundances of LiBeB in old halo stars indicate inconsistencies with this explanation. We have used a simple leaky-box model to predict the cosmic-ray elemental and isotopic abundances of LiBeB in the present epoch. We conducted a survey of recent scientific literature on fragmentation cross sections and have calculated the amount of uncertainty they introduce into our model. The predicted particle intensities of this model were compared with high energy (E_(ISM) = 200–500 MeV/nucleon) cosmic-ray data from the Cosmic Ray Isotope Spectrometer (CRIS), which indicates fairly good agreement with absolute fluxes for Z ≥ 5 and relative isotopic abundances for all LiBeB species.

Additional Information

© 2001 American Institute of Physics. This research was supported by NASA at the California Institute of Technology, (grant NAG5-6912), the Jet Propulsion Laboratory, the NASA Goddard Space Flight Center, and Washington University.

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Published - YANaipcp01.pdf

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Additional details

Identifiers

Eprint ID
28565
Resolver ID
CaltechAUTHORS:20111222-093454569

Funding

NASA
NAG5-6912
JPL
NASA Goddard Space Flight Center
Washington University

Dates

Created
2011-12-22
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Space Radiation Laboratory , Physics Department
Series Name
AIP Conference Proceedings
Series Volume or Issue Number
598
Other Numbering System Name
Space Radiation Laboratory
Other Numbering System Identifier
2001-61