22Na, Ne–E, extinct radioactive anomalies and unsupported 40Ar

@article{Clayton197522NaNE,
  title={22Na, Ne–E, extinct radioactive anomalies and unsupported 40Ar},
  author={Donald D. Clayton},
  journal={Nature},
  year={1975},
  volume={257},
  pages={36-37}
}
  • D. Clayton
  • Published 1 September 1975
  • Physics, Geology
  • Nature
A NEW picture1 of the origin of the known extinct radioactivities (129I and 244Pu) holds that these radioactive species were precipitated in grains forming in the rapidly cooling ejecta of explosive nucleosynthesis, and that their decay occurred in interstellar grains rather than in the meteorites. If so, our interpretation of extinct radioactivities is enlarged. Their detectability is no longer related to the usual criterion that they live long enough for the meteorites to form, but rather… 
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A concise review of the status of research on short-lived nuclei is presented. The importance of these nuclei is very great in spite of the fact that they are essentially absent today (except for…
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