Other
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..528..402y&link_type=abstract
ACCELERATION AND TRANSPORT OF ENERGETIC PARTICLES OBSERVED IN THE HELIOSPHERE: ACE 2000 Symposium. AIP Conference Proceedings, V
Other
2
Cosmic Rays, Cosmic Ray Nucleosynthesis, Neutrino, Muon, Pion, And Other Elementary Particles, Cosmic Rays
Scientific paper
Galactic cosmic rays (GCRs) pass through the interstellar medium (ISM) and undergo nuclear interactions that produce secondary fragments. The abundances of radioactive secondary species can be used to derive a galactic confinement time for cosmic rays using the amount of ISM material traversed by the cosmic rays inferred from stable GCR secondary abundances. Abundance measurements of long-lived species such as 10Be, 26Al, 36Cl, and 54Mn allow a comparison of propagation histories for different parent nuclei. Abundances for these species, measured in the energy range ~50-500 MeV/nuc using the Cosmic Ray Isotope Spectrometer (CRIS) aboard the Advanced Composition Explorer (ACE) spacecraft, indicate a confinement time τesc=16.2+/-0.8 Myr. We have modeled the production and propagation of the radioactive secondaries and discuss the implications for GCR transport. .
Binns Robert W.
Christian Eric R.
Cummings Alan C.
Davis James A.
George Samuel J.
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