Lunar Surface Radioactivity: Preliminary Results of the Apollo 15 and Apollo 16 Gamma-Ray Spectrometer Experiments
- 23 February 1973
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 179 (4075) , 800-803
- https://doi.org/10.1126/science.179.4075.800
Abstract
Gamma-ray spectrometers on the Apollo 15 and Apollo 16 missions have been used to map the moon's radioactivity over 20 percent of its surface. The highest levels of natural radioactivity are found in Mare Imbrium and Oceanus Procellarum with contrastingly lower enhancements in the eastern maria. The ratio of potassium to uranium is higher on the far side than on the near side, although it is everywhere lower than commonly found on the earth.Keywords
This publication has 4 references indexed in Scilit:
- Apollo 16 Geochemical X-ray Fluorescence Experiment: Preliminary ReportScience, 1972
- Apollo 15 Geochemical X-Ray Fluorescence Experiment: Preliminary ReportScience, 1972
- Preliminary Examination of Lunar Samples from Apollo 14Science, 1971
- Relative Contributions of Uranium, Thorium, and Potassium to Heat Production in the EarthScience, 1964