Relative fission yields of ten nuclides produced by proton-induced fission of natural uranium and U 235 were determined at several proton energies in the range 12 to 20 Mev. The expected trend toward symmetric fission at increased energies is observed. A statistical relation is used to correlate this shift in fission symmetry with the excitation energy of the compound nucleus.

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The differential cross section for the inelastic scattering of 135 MeV protons leading to the9/2+ (9·5 MeV) state in 13C has been measured. Microscopic DWBA analyses show that the angular distribution is well described by a pure (or nearly pure) 1p3/2 to 1d5/2 neutron transition with a total angular momentum transfer of 4, a description which is consistent with the previously observed large asymmetry in inelastic π+ and π- scattering to this state.