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Proton Reactions of 238U in the 5-12 MeV Range

The relative yields of many principal fission products from 5.6, 7.3, 9.4, and 11.5 MeV proton interactions with U have been measured. The yields at 11.5 MeV are very similar to those from 14 MeV neutron fission of U. The production cross sections of Np at the same energies were also determined. This nuclide is formed as often as fission at the lowest energy but only 3.8% as often at the highest energy.