Search for Supernova-Produced {sup 60}Fe in a Marine Sediment

Journal Article · Fri Sep 19 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.121101· OSTI ID:21179720

Fitoussi, C; Raisbeck, G M; Lunney, D ^[1]; Knie, K ^[2]; Korschinek, G; Faestermann, T; Poutivtsev, M; Rugel, G ^[2]; Goriely, S ^[3]; Waelbroeck, C ^[4]; Wallner, A ^[5]

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1. Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse (CSNSM) IN2P3/CNRS, Universite Paris Sud, Batiment 108, 91405 Orsay (France)
2. Fakultaet fuer Physik, Technische Universitaet Muenchen, James-Franck-Strasse 1, 85747 Garching (Germany)
3. Institut d'Astronomie et d'Astrophysique, C.P. 226, Universite Libre de Bruxelles, Boulevard Du Triomphe, B-1050 Brussels (Belgium)
4. Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, 91198 Gif-sur-Yvette (France)
5. VERA Laboratory, Fakultaet fuer Physik, Universitaet Wien, Waehringer Strasse 17, A-1090 Vienna (Austria)

An {sup 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 {sup 60}Fe concentrations along a dated marine sediment. We find no {sup 60}Fe peak at the expected level from 1.7 to 3.2 Myr ago. Possible causes for the discrepancy are discussed.

• OSTI ID: 21179720
• Journal Information: Physical Review Letters, Vol. 101, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.101.121101; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
EXPLOSIONS
IRON 60
SEAS
SEDIMENTS
SOLAR SYSTEM
SUPERNOVAE
TIME RESOLUTION