from The New York Times
Rays and Neutrons, for Art’s Sake
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How nuclear science helped answer questions of provenance, age and authenticity about art. Methods used include some of the most fundamental in nuclear science, such as neutron activation analysis, proton-induced X-ray emission, accelerator mass spectrometry and X-ray fluorescence spectrometry.

Check out the The Limestone Sculpture Provenance Project: A Case Study at the MET and the accompanying video on how neutron activation analysis has helped uncover the mystery of an angel fragment.