New fragmentation cross sections for galactic cosmic-ray propagation

Details New fragmentation cross sections for galactic cosmic-ray propagation New fragmentation cross sections for galactic cosmic-ray propagation

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprp11004g&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

Improvements in galactic cosmic-ray propagation model parameters are needed to fully exploit high-precision composition data such as that from the ACE and Ulysses spacecraft. Nuclear fragmentation cross section uncertainties have a significant effect on estimates of heavy nuclei spallation in the interstellar medium in certain cases. We have made new measurements of fragmentation cross sections from 56Fe and 60Ni beams on a liquid hydrogen target at multiple energies between 300 and 1500 MeV/nucleon at the GSI heavy ion synchrotron. These are typical interstellar energies for particles observed by ACE and Ulysses. We will present preliminary results and discuss their impact on some important questions about the source and acceleration of galactic cosmic rays.

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