Calculations of cosmic-ray helium transport in shielding materials
Technical Report
·
OSTI ID:5406234
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.
- Research Organization:
- National Aeronautics and Space Administration, Hampton, VA (United States). Langley Research Center
- OSTI ID:
- 5406234
- Report Number(s):
- N-94-17666; NASA-TP-3354; L-17225; NAS-1.60:3354; CNN: RTOP 199-45-16-11
- Country of Publication:
- United States
- Language:
- English
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