Nuclear emulsion measurements of the dose contribution from tissue disintegration stars on the Apollo-Soyuz mission

Details Nuclear emulsion measurements of the dose contribution from tissue disintegration stars on the Apollo-Soyuz mission Nuclear emulsion measurements of the dose contribution from tissue disintegration stars on the Apollo-Soyuz mission

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977uwfp.rept.....s&link_type=abstract

Technical Report, Jul. 1976 - Mar. 1977 University of West Florida, Pensacola.

Biology

Apollo Soyuz Test Project, Dosimeters, Nuclear Emulsions, Radiobiology, Aerospace Environments, Alpha Particles, Gelatins, Neutrons, Nuclear Radiation, Protons, Radiation Dosage, Tissues (Biology)

Scientific paper

A total of 996 disintegration stars were prong-counted in two 100 micron llford K.2 emulsions from the dosimeter of the Docking Pilot on Apollo-Soyuz. The change of slope of the distribution at a prong number of about 6 or 7 indicates 219 stars as originating in gelatin. Applying the QF values set forth in official regulations to the energy spectra of the proton and a alpha prongs of the gelatin stars leads to a tissue star dose of 7.8 millirad or 45 millirem. The quoted values do not include the dose contribution from star-produced neutrons since neutrons do not leave visible prongs in emulsion. Nuclear theory, in good agreement with measurements of galactic radiation in the earth's atmosphere, indicates that the dose equivalent from neutrons is about equal to the one from all ionizing secondaries of stars. Application of this proposition to the star prong spectrum found on Apollo-Soyuz would set the total tissue star dose for the mission at approximately 90 millirem.

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