Calculations of cosmic-ray helium transport in shielding materials

Details Calculations of cosmic-ray helium transport in shielding materials Calculations of cosmic-ray helium transport in shielding materials

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9417666c&link_type=abstract

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Boltzmann Transport Equation, Galactic Cosmic Rays, Helium Isotopes, Light Ions, Nuclear Interactions, Radiation Shielding, Spacecraft Shielding, Energy Spectra, Galactic Nuclei, Particle Energy, Particle Interactions, Solar Activity Effects

Scientific paper

The transport of galactic cosmic-ray helium nuclei and their secondaries through bulk shielding is considered using the straight-ahead approximation to the Boltzmann equation. A data base for nuclear interaction cross sections and secondary particle energy spectra for high-energy light-ion breakup is presented. The importance of the light ions H-2, H-3, and He-3 for cosmic-ray risk estimation is discussed, and the estimates of the fractional contribution to the neutron flux from helium interactions compared with other particle interactions are presented using a 1977 solar minimum cosmic-ray spectrum.

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