Freiburg 2024 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 9: Accelerator Mass Spectrometry IV
MS 9.6: Talk
Friday, March 15, 2024, 12:30–12:45, HS 3042
Characterizing Lunar Soil with Cosmogenic Radionuclides for the Search for Interstellar Radionuclides — •Sebastian Zwickel1,2, Sebastian Fichter1, Dominik Koll1,2,3, Johannes Lachner1, Marc Norman3, Stefan Pavetich3, Georg Rugel1, Konstanze Stuebner1, Steve Tims3, Josua Vahle1,2, Stephan Winkler1, and Anton Wallner1,2 — 1Helmholtz-Zentrum Dreden-Rossendorf, Dresden, Germany — 2Technische Universität Dresden, Dresden, Germany — 3Australian National University, Canberra, Australia
Despite being responsible for the nucleosynthesis of half of all heavier nuclides in the galaxy, the site of the r-process is still an open question in nuclear astrophysics. The detection of the pure r-process nuclide 244Pu, live, in deep-sea ferromanganese crusts already demonstrated ongoing r-process events. A complementary archive for 244Pu is lunar soil - lacking in time resolution, but offering a proposed exposure time to interstellar dust deposition ranging from a few up to hundreds of million years. In this project we aim for the detection of interstellar 244Pu and 60Fe in lunar soil. Important will be the proper characterization of lunar soil for exposure history and composition. Among various additional analytical methods, we measure cosmogenic 10Be, 26Al, 41Ca and 53Mn.
This talk presents first results of the cosmogenic radionuclides 10Be, 26Al and 53Mn measured in a set of lunar samples and discusses their use in characterizing the exposure history of the samples.
Keywords: AMS; Cosmogenic; Interstellar; Lunar