The measurement of radiation exposure of astronauts by radiochemical techniques Quarterly research report, 6 Jul. - 4 Oct. 1970

Gamma ray spectrometer for measuring radiation exposure of astronaut

The Measurement of Radiation Exposure of Astronauts by Radiochemical Techniques: January 3, 1972 through April 2, 1972

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 {sup 22}Na, {sup 40}K, {sup 51}Cr, {sup 59}Fe, and {sup 137}Cs 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 {sup 210}Po 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 {+-} 0.012 disintegrations cm{sup -2} sec{sup -1} of {sup 222}Rn in the lunar atmosphere and 0.0238 {+-} 0.0035 disintegrations cm{sup -2} sec{sup -1} of {sup 210}Po on the lunar surface have been calculated for Oceanus Procellarum. A summary of a paper entitled, "Radon-222 Activity at Oceanus Procellarum," and the text of a manuscript entitled, "Radon-222 in the Lunar Atmosphere," are included as appendices

Induced radionuclides in astronauts Final report, 15 Jun. 1967 - 1 Sep. 1968

Experimental determination of cosmic radiation effects on tissue equivalent materials and human

Determination of the radionuclide content of feces and urine from astronauts engaged in space flight

Measurement of radiation exposure of Apollo 7, 8, 9, and 10 astronauts by determination of radionuclide content of feces and urin

Cosmic ray induced radioactivity in astronauts as a measure of radiation dose /a/

Cosmic ray induced radioactivity in astronauts as measure of radiation dosag

Determination of the radionuclide content of feces and urine from astronauts engaged in space flight

Activation analysis of fecal samples from Apollo 7, 8, 9, and 10 astronauts to determine effects of space flight on mass balance of various elements by human bod

The measurement of radiation exposure of astronauts by radiochemical techniques Quarterly research report, 6 Apr. - 5 Jul. 1970

Radionuclide content in feces and urine of Apollo 7 through 13 astronaut

THE MEASUREMENT OF RADIATION EXPOSURE OF ASTRONAUTS BY RADIOCHEMICAL TECHNIQUES October 6,1969 Through January 4, 1970

The urine and feces specimens from the Apollo 11 mission were analyzed for their radionuclide content. Estimates of cosmic radiation dose received by the astronauts were difficult to determine due to decay of the short-lived radionuclides during quarantine. The concentrations of {sup 7}Be, {sup 22}Na, {sup 40}K, {sup 59}Fe, {sup 60}Co, and {sup 137}Cs were determined. No {sup 147}Pm was observed in any of the samples. The concentrations of 16 major, minor, and trace elements were determined in fecal samples from Apollos 8 and 10. Large discrepancies between the excretion rates and normal dietary intakes were noted for cobalt, iron, tin , and potassium. An interpretation of the hazards these deviations may produce requires the determination of the elemental concentrations of the foodstuffs used during these missions. The fecal samples from the Apollo 11 mission were analyzed for glass fiber content. One anomalous sample was observed having a glass fiber content twofold greater than any previously measured specimen. A piece of the outer thermal coating of the Apollo 12 spacecraft was analyzed for cosmic-ray-induced radioactivity. Beryllium-7 was observed