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Radiation Hazards to Crews of Interplanetary Missions : Biological Issues and Research Strategies

By: (Author) Division on Engineering and Physical Sciences , (Author) and Applications Commission on Physical Sciences Mathematics , (Author) National Research Council , (Author) Space Studies Board , (Author) Task Group on the Biological Effects of Space Radiation

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Ksh 8,450.00

Format: Paperback / Softback

ISBN-10: 0309056985

ISBN-13: 9780309056984

Publisher: National Academies Press

Imprint: National Academies Press

Country of Manufacture: GB

Country of Publication: GB

Publication Date: Feb 27th, 1997

Print length: 88 Pages

Product Classification: Astrophysics

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NASA's long-range plans include possible human exploratory missions to the moon and Mars within the next quarter century. Such missions beyond low Earth orbit will expose crews to transient radiation from solar particle events as well as continuous high-energy galactic cosmic rays ranging from energetic protons with low mean linear energy transfer (LET) to nuclei with high atomic numbers, high energies, and high LET. Because the radiation levels in space are high and the missions long, adequate shielding is needed to minimize the deleterious health effects of exposure to radiation. The knowledge base needed to design shielding involves two sets of factors, each with quantitative uncertainty-the radiation spectra and doses present behind different types of shielding, and the effects of the doses on relevant biological systems. It is only prudent to design shielding that will protect the crew of spacecraft exposed to predicted high, but uncertain, levels of radiation and biological effects. Because of the uncertainties regarding the degree and type of radiation protection needed, a requirement for shielding to protect against large deleterious, but uncertain, biological effects may be imposed, which in turn could result in an unacceptable cost to a mission. It therefore is of interest to reduce these uncertainties in biological effects and shielding requirements for reasons of mission feasibility, safety, and cost.

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