Journal article
Investigation of a Monturaqui Impactite by Means of Bi-Modal X-ray and Neutron Tomography
Department of Applied Mathematics and Computer Science, Technical University of Denmark1
Technical University of Denmark2
University of Copenhagen3
Statistics and Data Analysis, Department of Applied Mathematics and Computer Science, Technical University of Denmark4
Visual Computing, Department of Applied Mathematics and Computer Science, Technical University of Denmark5
Department of Physics, Technical University of Denmark6
Neutrons and X-rays for Materials Physics, Department of Physics, Technical University of Denmark7
French Alternative Energies and Atomic Energy Commission8
European Spallation Source ERIC9
X-ray and neutron tomography are applied as a bi-modal approach for the 3D characterisation of a Monturaqui impactite formed by shock metamorphism during the impact of an iron meteorite with the target rocks in the Monturaqui crater (Chile). The particular impactite exhibits structural heterogeneities on many length scales: its composition is dominated by silicate-based glassy and crystalline materials with voids and Fe/Ni-metal and oxihydroxides particles generally smaller than 1 mm in diameter.
The non-destructive investigation allowed us to apply a novel bi-modal imaging approach that provides a more detailed and quantitative understanding of the structural and chemical composition compared to standard single mode imaging methods, as X-ray and neutron interaction with matter results in different attenuation coefficients with a non-linear relation.
The X-ray and neutron data sets have been registered, and used for material segmentation, porosity and metallic content characterization. The bimodal data enabled the segmentation of a large number of different materials, their morphology as well as distribution in the specimen including the quantification of volume fractions.
The 3D data revealed an evaporite type of material in the impactite not noticed in previous studies. The present study is exemplary in demonstrating the potential for non-destructive characterisation of key features of complex multi-phase objects such as impactites.
Language: | English |
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Year: | 2018 |
Pages: | 72 |
ISSN: | 2313433x , 1560229x and 10179909 |
Types: | Journal article |
DOI: | 10.3390/jimaging4050072 |
ORCIDs: | 0000-0001-9315-8787 , Fedrigo, Anna , Dahl, Vedrana Andersen , Dahl, Anders Bjorholm and Gundlach, Carsten |
Bimodal imaging Computed tomography Impactite Monturaqui Multimodal imaging Neutron imaging X-ray imaging
bimodal imaging computed tomography impactite multimodal imaging neutron imaging