The Xenon Record of Extinct Radioactivities in the Earth

@article{Boulos1971TheXR,
  title={The Xenon Record of Extinct Radioactivities in the Earth},
  author={Mervet S. Boulos and Oliver K. Manuel},
  journal={Science},
  year={1971},
  volume={174},
  pages={1334 - 1336}
}
Analyses of xenon from well gas rich in carbon dioxide reveal a large excess of radiogenic xenon-129 from the decay of extinct iodine-129. Smaller excesses observed in the heavy xenon isotopes are from fission. These results place narrow limits on any age difference between the earth and the oldest meteorites. The occurrence of excess radiogenic xenon-129 in well gas also suggests that any quantitative degassing of existing solid materials to form the atmosphere must have been limited to a very… Expand
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Mass-spectrometric analyses of Xe released from acid-treated U ore reveal that apparent Xe fission yields significantly deviate from the normal values, and chemically fractionated fission (CFF), previously observed only in materials experienced neutron bursts, is likely responsible for the isotopic difference in Xe in the Earth's and Martian atmospheres. Expand
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