For example, PIXE can tell the difference between copper mined in the U.S. from copper mined in Britain.

FORBES: Scientists Use Ion Beams To Detect Forged Art

One of the interesting means the physicists article focuses on is the use of proton-induced x-ray emission (PIXE), which allows for a non-destructive study of art objects.

FORBES: Scientists Use Ion Beams To Detect Forged Art