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January 2012

Volume 65, Issue 1

cover: Nuclear physics has provided several techniques for determining the admixture of trace elements in an artwork or artifact. The Quick Study beginning on page 58 highlights two of those techniques: proton-induced x-ray emission and accelerator mass spectrometry. In this image, a PIXE beamline at the University of Notre Dame is aimed at an icon depicting Christ. By using PIXE, scientists there hope to learn more about the tools, pigments, and techniques used to create the artwork.

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