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Published online by Cambridge University Press: 25 February 2011
A 700 keV proton beam was used to induce the emission of X-rays in a single crystal copper target. The X-rays are diffracted inside the target, giving rise to a large number of lines, which were recorded on photographic film. The presence of certain lines and the absence of others, as well as the variable intensity along the lines, are explained qualitatively with a kinematical approach.