Apollo mission experience

Dosimetric implications for manned space flight are evaluated by analyzing the radiation field behind the heavy shielding of a manned space vehicle on a near-earth orbital mission and how it compares with actual exposure levels recorded on Apollo missions. Emphasis shifts from flux densities and energy spectra to incident radiation and absorbed doses and dose equivalents as they are recorded within the ship at locations close to crew members

A note on the revised galactic neutron spectrum of the Ames collaborative study

Energy distributions of the neutron dose equivalents in the 0.1 to 300 Mev interval for the Ames and Hess spectra are compared. The Ames spectrum shows no evaporation peak, moves the bulk of the flux away from the region of elastic collision and spreads it more evenly over higher energies. The neutron spectrum in space does not seem to hear out the Ames model. Emulsion findings on all manned missions of the past consistently indicate that evaporation events are a prolific source of neutrons in space

Energy dissipation characteristics in tissue for ionizing radiation in space Progress report no. 13, 1 Dec. 1965 - 28 Feb. 1966

Energy dissipation characteristics in tissue for ionizing radiation in spac

Criteria for personal dosimetry in mixed radiation fields in space

The complexity of direct reading and passive dosimeters for monitoring radiation is studied to strike the right balance of compromise to simplify the monitoring procedure. Trapped protons, tissue disintegration stars, and neutrons are analyzed

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

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

Tissue dosages from alpha particles and heavy nuclei in solar particle beams in space

Tissue dosages from alpha particles and heavy nuclei in solar particle beams in spac

A Note on the Galactic Radiation Exposure in Geomagnetically Unprotected Regions of Space

Galactic radiation during quiet sun and expected tissue dosage in space systems of low shieldin

Radiation measurements at Supersonic Transport altitude with balloon-borne nuclear emulsions

Proton irradiation measurements with balloon-borne nuclear emulsions at supersonic transport altitude during solar maximum at quiet su

Public health aspects of galactic radiation exposure in supersonic transport

Galactic radiation hazards in passenger travel of supersonic transpor

Personnel neutron monitoring in space

A brief review is presented of available information on the galactic neutron spectrum. An examination is made of the difficulties encountered in the determination of the dose equivalent of neutron recoil protons in the presence of a substantially larger background of trapped and star-produced protons as well as other ionizing particles in space