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Evaluation of the hazard from exposure to electron irradiation simulating that in the synchronous orbitThe electron spectrum predicted for the synchronous orbit was simulated to determine the effects that might occur to astroscientists exposed to such irradiation while on a prolonged space station mission in that region. Miniature pigs were exposed to monoenergetic and spectral-fractionated irradiations with 0.5 to 2.1 MeV electrons. Clinical and pathological alterations observed in biopsies were correlated with depth-dose pattern and length of post irradiation period up to one year. With monoenergetic electrons, the lowest dose causing a recognizable lesion was 1450 rad and with increasing dose lesions appeared earlier and were more severe. At the highest dose given, 2650 rad, ulceration extending into the dermis was present by twenty one days and required about four months for complete healing. Spectral-fractionated irradiations, in which the total dose range was essentially comparable to that of the monoenergetic series, resulted in very minimal outer dermis edema at 1790 rad and at no dose employed did necrosis of epidermis or ulceration into dermis occur.
Document ID
19720010040
Document Type
Conference Paper
Authors
Lippincott, S. W. (NASA Langley Research Center Hampton, VA, United States)
Foelsche, T. (NASA Langley Research Center Hampton, VA, United States)
Montour, J. L. (NASA Langley Research Center Hampton, VA, United States)
Bender, R. (NASA Langley Research Center Hampton, VA, United States)
Wilson, I. J. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Publication Information
Publication: Proc. of the Natl. Symp. on Nat. and Manmade Radiation in Space
Subject Category
BIOSCIENCES
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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Related Records

IDRelationTitle19720009951Analytic PrimaryProceedings of the National Symposium on Natural and Manmade Radiation in Space