Mars surface radiation exposure for solar maximum conditions and 1989 solar proton events

Details Mars surface radiation exposure for solar maximum conditions and 1989 solar proton events Mars surface radiation exposure for solar maximum conditions and 1989 solar proton events

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992stin...9319109s&link_type=abstract

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Mathematics

Logic

Galactic Cosmic Rays, Mars Atmosphere, Mars Surface, Radiation Dosage, Solar Activity Effects, Solar Cycles, Solar Flares, Solar Protons, Blood, Carbon Dioxide, Eye (Anatomy), Nucleons, Organs, Physiological Effects, Protons, Radiation Effects

Scientific paper

The Langley heavy-ion/nucleon transport code, HZETRN, and the high-energy nucleon transport code, BRYNTRN, are used to predict the propagation of galactic cosmic rays (GCR's) and solar flare protons through the carbon dioxide atmosphere of Mars. Particle fluences and the resulting doses are estimated on the surface of Mars for GCR's during solar maximum conditions and the Aug., Sep., and Oct. 1989 solar proton events. These results extend previously calculated surface estimates for GCR's at solar minimum conditions and the Feb. 1956, Nov. 1960, and Aug. 1972 solar proton events. Surface doses are estimated with both a low-density and a high-density carbon dioxide model of the atmosphere for altitudes of 0, 4, 8, and 12 km above the surface. A solar modulation function is incorporated to estimate the GCR dose variation between solar minimum and maximum conditions over the 11-year solar cycle. By using current Mars mission scenarios, doses to the skin, eye, and blood-forming organs are predicted for short- and long-duration stay times on the Martian surface throughout the solar cycle.

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