The crew of a manned Mars mission will be unavoidably exposed to galactic cosmic ray (GCR) flux. If one employs conventional radiological health practices involving absorbed dose(D), dose-equivalents (H), and LET-depen-dent quality factors (Q)2, the Mars mission crew shielded by 2 g/cm All could receive about 0.7 Sv in a 460-day mission at solar minimum. However three-fourths of this dose-equivalent in free space is contributed by high LET heavy ions (Z ≥ 3) and target fragments with average Q of 10.3 and 20, respectively. Such high quality factors for these particles may be inappropriate. Moreover, in a 460-day mission less than half of the nuclei in the body of an astronaut will have been traversed by a single heavy particle. The entire concept of D/Q/H as applied to GCR must be reconsidered.


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    Titel :

    Radiological Health Risks


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    Intersociety Conference on Environmental Systems ; 1989



    Erscheinungsdatum :

    01.07.1989




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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