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Phys. Rev. Lett. 83, 18–21 (1999)

Indication for Supernova Produced 60Fe Activity on Earth

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K. Knie1,2, G. Korschinek1,*, T. Faestermann1, C. Wallner1, J. Scholten3, and W. Hillebrandt2
1Technische Universität München, Physik-Department, 85748 Garching, Germany
2Max-Planck Institut für Astrophysik, 85740 Garching, Germany
3Geologisch-Paläontologisches Institut, Universität Kiel, 24098 Kiel, Germany

Received 14 December 1998; published in the issue dated 5 July 1999

In a deep ocean ferromanganese crust an excess of 60Fe 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 60Fe on earth. There is even a weak indication that the flux into the crust was higher about 5 Myr ago.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.18
DOI:
10.1103/PhysRevLett.83.18
PACS:
97.60.Bw, 26.30.+k, 91.50.-r, 98.38.Am

*To whom the correspondence should be addressed.

 
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