Stuttgart 2012 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 9: Accelerator Mass Spectrometry and Applications II
MS 9.3: Talk
Friday, March 16, 2012, 11:00–11:15, V57.06
53Mn and 60Fe measurements in lunar samples by means of accelerator mass spectrometry (AMS) — •Leticia Fimiani1, Thomas Faestermann1, José Manuel Gómez Guzmán1, Karin Hain1, Gregory Herzog2, Klaus Knie3, Gunther Korschinek1, Bret Ligon2, Peter Ludwig1, Jisun Park2, and Georg Rugel1,4 — 1Fakultät für Physik, Technische Universität München, D-85748, Garching, Germany — 2Department of Chemistry & Chemical Biology, Rutgers University, Piscataway, NJ 08854, United States — 3GSI, Planckstrasse 1, D-64291, Darmstadt, Germany — 4Forschungszentrum Dresden-Rossendorf, D-01314, Dresden, Germany
Cook et al, 40th LPSC 1129 (2009) reported a concentration of 14−6+9 dpm 60Fe/[kg Ni] (T1/2=2.62·106a) in a surface sample of the Apollo 12 12025/8 drive tube. This value is higher than the one expected due to galactic or solar cosmic ray production and may suggest the deposition of supernova debris on the lunar surface about 2 Ma ago. In order to try to reproduce this result, new measurements were made in material from the same core and position. To widen the search for supernova debris, we also analyzed four near-surface samples of lunar drive tube 15008; and one each from the skim, scoop and under-boulder samples 69921/41/61 via AMS in the Maier Leibnitz Laboratorium in Garching, Germany. The measuring technique and the preliminary results will be discussed.