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Measurement of radiation exposure of astronauts by radiochemical techniques (Document No: 19730008387)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Brodzinski, R. L. |
| Copyright Year | 1972 |
| Description | Only two of the fecal specimens collected inflight during the Apollo 15 mission were returned for analysis. Difficulty in obtaining reasonably accurate radiation dose estimates based on the cosmogenic radionuclide content of the specimens was encountered due to the limited sampling. The concentrations of Na-22, K-40, Cr-51, Fe-59, and Cs-137 are reported. The concentrations of 24 major, minor, and trace elements in these two specimens were determined. Most concentrations are typical of those observed previously. Major exceptions are extremely low values for selenium and extraordinarily high values for rare earth elements. The net Po-210 activities in the Apollo 11 and 12 Solar Wind Composition foils and in the Apollo 8 and 12 spacecraft reflective coatings due to lunar exposure have been determined. Equilibrium concentrations of 0.082 + or - 0.012 disintegrations /sq cm sec of Rn-222 in the lunar atmosphere and 0.0238 + or - 0.0035 disintegrations /sq cm sec of Po-210 on the lunar surface have been calculated for Oceanus Procellarum. |
| File Size | 1020107 |
| Page Count | 34 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730008387 |
| Archival Resource Key | ark:/13960/t22c3sb1c |
| Language | English |
| Publisher Date | 1972-04-15 |
| Access Restriction | Open |
| Subject Keyword | Apollo Flights Rare Earth Elements Radiochemistry Astronauts Feces Solar Wind Radiation Dosage Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
