Search for Supernova-Produced <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mmultiscripts><mi>Fe</mi><mprescripts></mprescripts><none></none><mn>60</mn></mmultiscripts></math></span> in a Marine Sediment

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

doi:10.1103/PhysRevLett.101.121101

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

C. Fitoussi¹, G. M. Raisbeck¹, K. Knie^2,5, G. Korschinek², T. Faestermann², S. Goriely³, D. Lunney¹, M. Poutivtsev², G. Rugel² et al.

C. Waelbroeck⁴ and A. Wallner⁵

¹Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM) IN2P3/CNRS, Université Paris Sud, Bâtiment 108, 91405 Orsay, France
²Fakultät für Physik, Technische Universität München, James-Franck-Straße 1, 85747 Garching, Germany
³Institut d’Astronomie et d’Astrophysique, C.P. 226, Université Libre de Bruxelles, Boulevard Du Triomphe, B-1050 Brussels, Belgium
⁴Laboratoire des Sciences du Climat et de l’Environnement, Domaine du CNRS, 91198 Gif-sur-Yvette, France
⁵VERA Laboratory, Fakultät für Physik, Universität Wien, Währinger Straße 17, A-1090 Vienna, Austria

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Phys. Rev. Lett. 101, 121101 – Published 19 September, 2008

DOI: https://doi.org/10.1103/PhysRevLett.101.121101

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 $2.8 \pm 0.4 Myr$ 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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