Preliminary estimates of radiation exposures for manned interplanetary missions from anomalously large solar flare events

Computer Science

Scientific paper

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Estimates, Interplanetary Flight, Manned Space Flight, Radiation Dosage, Solar Flares, Solar Radiation, Aluminum, Computer Programs, Neutrons, Nucleons, Protons, Radiation Shielding, Transport Theory, Water

Scientific paper

Preliminary estimates of radiation exposures for manned interplanetary missions resulting from anomalously large solar flare events are presented. The calculations use integral particle fluences for the February 1956, November 1960, and August 1972 events as inputs into the Langley Research Center nucleon transport code BRYNTRN. This deterministic code transports primary and secondary nucleons (protons and neutrons) through any number of layers of target material of arbitrary thickness and composition. Contributions from target nucleus fragmentation and recoil are also included. Estimates of 5 cm depth doses and dose equivalents in tissue are presented behind various thicknesses of aluminum, water, and composite aluminum/water shields for each of the three solar flare events.

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