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Search for supernova-produced 60Fe in a marine sediment
Fitoussi, C.; Raisbeck, G.; Knie, K.; Korschinek, G.; Faestermann, T.; Goriely, S.; Lunney, D.; Poutivtsev, M.; Rugel, G.; Waelbroeck, C.; Wallner, A. (2008). Search for supernova-produced 60Fe in a marine sediment. Phys. Rev. Lett. 101(12). dx.doi.org/10.1103/PhysRevLett.101.121101
In: Physical Review Letters. American Physical Society: Woodbury, N.Y., etc.. ISSN 0031-9007, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Fitoussi, C.
  • Raisbeck, G.
  • Knie, K.
  • Korschinek, G.
  • Faestermann, T.
  • Goriely, S.
  • Lunney, D.
  • Poutivtsev, M.
  • Rugel, G.
  • Waelbroeck, C.
  • Wallner, A.

Abstract
    An (60)Fe peak in a deep-sea FeMn crust has been interpreted as due to the signature left by the ejecta of a supernova explosion close to the solar system 2.8 +/- 0.4 Myr ago [Knie et al., Phys. Rev. Lett. 93, 171103 (2004)]. In an attempt to confirm this interpretation with better time resolution and obtain a more direct flux estimate, we measured (60)Fe concentrations along a dated marine sediment. We find no (60)Fe peak at the expected level from 1.7 to 3.2 Myr ago. Possible causes for the discrepancy are discussed.

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