Physics
Scientific paper
Feb 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973sci...179..800m&link_type=abstract
Science, Volume 179, Issue 4075, pp. 800-803
Physics
39
Scientific paper
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.
Arnold James R.
Metzger Albert E.
Peterson Laurence E.
Reedy Robert C.
Trombka Jacob I.
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