Heidelberg 2015 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 13: Accelerator Mass Spectrometry and Applications 3
MS 13.4: Vortrag
Donnerstag, 26. März 2015, 18:00–18:15, PH/HS2
Interstellar radionuclides in lunar samples — •Leticia Fimiani1, David Cook2, Thomas Faestermann1, Jose Manuel Gomez Guzman1, Karin Hain1, Gregory Herzog3, Klaus Knie1,4, Gunther Korschinek1, Bret Ligon3, Peter Ludwig1, Jisun Park3, Robert Reedy5, and Georg Rugel1,6 — 1Technische Universität München, Garching, Germany — 2Institut für Geochemie und Petrologie ETH, Zurich, Switzerland — 3Dept. Chem. & Chem. Biol, Rutgers U., Piscataway NJ, United States of America — 4GSI, Darmstadt, Germany — 5Planetary Science Institute,Los Alamos NM, United States of America — 6Forschungszentrum Dresden-Rosendorf, Dresden, Germany
The enhanced activity of 60Fe found in several lunar samples is a confirmation of the deposition of supernova debris in the solar system. The concentrations of 53Mn and 60Fe were determined in samples originating from three different Apollo missions, by means of accelerator mass spectrometry (AMS).
A local interstellar fluence of 60Fe between 2x107-4x108 at/cm2 is consistent with the findings in a ferromanganese crust from the Pacific Ocean reported by Knie et al [PRL 93, 171103, 2004]. In this talk the results of this work will be summarized, with emphasis on the possible background sources and details on how these were estimated.