Indication for Supernova ProducedActivity on Earth
- 5 July 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 83 (1) , 18-21
- https://doi.org/10.1103/physrevlett.83.18
Abstract
In a deep ocean ferromanganese crust an excess of radioactivity was measured by means of high sensitivity accelerator mass spectrometry. The enhanced concentrations measured in the first two of three layers (corresponding to a time span of 0–2.8 Myr and 3.7–5.9 Myr, respectively) suggest the deposition of supernova produced on earth. There is even a weak indication that the flux into the crust was higher about 5 Myr ago.
Keywords
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