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On the characterization of the "Paris" meteorite using PIXE, RBS and micro-PIXE

Abstract : "Paris" meteorite is a CM type carbonaceous chondrite, a primitive meteorite whose parent body has been formed in the early stage of the solar system and that has experienced low alterations (thermal and aqueous) since its formation. Proton induced X-ray emission (PIXE), Rutherford backscattering spectroscopy (RBS) and micro-PIXE techniques were used to characterize the elemental content and chemical composition of a "Paris" meteorite fragment from MNHN-France (Musée National d'Histoire Naturelle). As expected for a carbonaceous chondrite, macro-PIXE analysis revealed high overall concentrations in Fe, Si, Mg, while RBS showed 55 at.% of O and 7.7 at.% of C in average. Among the other elements, macro-PIXE analysis shows a relative enrichment of the fragment analyzed in Ca. Besides, a carbonaceous chondrite is a heterogeneous composite of different sized mineral and organic grains. Thus, we used a micro-beam to scan and analyze some micron-sized inclusions. By micro-PIXE analysis, it was possible to identify two types of crystals and an inclusion containing less than 0.1 wt.% of molybdenum
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Submitted on : Tuesday, August 20, 2013 - 12:13:47 PM
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M. Noun, M. Roumie, Thomas Calligaro, B. Nsouli, R. Brunetto, et al.. On the characterization of the "Paris" meteorite using PIXE, RBS and micro-PIXE. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier, 2013, 306, pp.261-264. ⟨10.1016/j.nimb.2012.12.063⟩. ⟨in2p3-00852225⟩



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