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The differential scattering cross section has been determined for protons scattered elastically from Mg 24 at a laboratory angle of 164°±5°. The targets consisted of thin Mg 24 F2 films evaporated onto thick graphite. Protons scattered elastically from Mg 24 were selected by a 90° magnetic analyzer and were counted by a proportional counter. At least nine anomalies occur in the cross section between 0.40 Mev and 3.95 Mev, indicating the excitation of nine levels of the compound nucleus, Al 25 . At several of the resonances, competing reaction cross sections have been shown to be relatively small.

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