Mathematics – Logic
Scientific paper
Oct 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997nasa.reptw....w&link_type=abstract
Technical Report, NASA-TP-3668; NAS 1.60:3668; L-17616
Mathematics
Logic
Exposure, Solar Storms, Relative Biological Effectiveness (Rbe), Fluence, Biophysics, Astronauts, Safety Factors, Space Missions, Protection, Nuclear Warfare
Scientific paper
The physical composition and intensities of exposures to solar particle events of sensitive astronaut tissues are examined under conditions approximating an astronaut in space. Response functions for conversion of particle fluence into dose and dose equivalent are used to establish significant fluence levels and the expected dose and dose rates of the most important events from past observations. The BRYNTRN transport code is used to evaluate the local environment experienced by sensitive tissues and is used to evaluate bioresponse models developed for use in tactical nuclear warfare. The present results will help to clarify the biophysical aspects of such exposure in the assessment of relative biological effectiveness (RBE) and dose rate effects and their impact on the design of protection systems for the astronauts. The use of polymers as shielding material in place of an equal mass of aluminum would provide a large safety factor without increasing the vehicle mass. This safety factor is sufficient to provide adequate protection if an event a factor of 2 larger than has ever been observed occurs during the mission.
Chang Chan-Kao
Cucinotta Francis A.
Dubey R. R.
Jones Timothy D.
Jordan Richard W.
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