Accession Number:

AD0649385

Title:

RADIATION MONITORING WITH NUCLEAR EMULSIONS ON PROJECT GEMINI II. RESULTS ON THE 14-DAY MISSION GEMINI VII.

Descriptive Note:

Joint rept.,

Corporate Author:

NAVAL AEROSPACE MEDICAL INST PENSACOLA FLA

Report Date:

1967-01-11

Pagination or Media Count:

21.0

Abstract:

Small nuclear emulsion packs worn by the astronauts at three locations inside their space suits were evaluated by track, grain, and enders count for evaluation of LET spectrum and absorbed dose. By using G.5K.2 emulsion pairs, a sustained resolution over the entire LET scale of protons from zero to relativistic energies was obtained. It was found that the energy dissipation centers heavily on low energies, with 40 per cent of the absorbed dose due to protons of less than 0.1 gsq cm residual range. Total proton doses at the six locations left and right chest, thigh pocket of each astronaut varied from 159 to 233 millirads. The enders count was found to vary by as much as a factor of 1.35 within the same 1 by 1 12-inch film sheet, indicating that the radiation field within the vehicle not only varies over distances comparable to body size, but also reflects local inhomogeneities of shielding conditions on a centimeter and millimeter scale. Author

Subject Categories:

  • Radiobiology
  • Nuclear Instrumentation
  • Nuclear Physics and Elementary Particle Physics
  • Astronautics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE