Low-Energy Proton Production by 160-Mev Protons

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Abstract
Energy and angular distributions of emitted protons in the energy range 5 to 23 Mev from lead, tantalum, tin, and zinc when bombarded by 160-Mev protons were obtained. A peak was obtained in each of the energy distributions slightly below the Coulomb barrier of each element. The magnitude of the peaks increased with a decrease in the Coulomb barrier of the element. The angular dependence of the heights of the peaks for all of the elements was approximately isotropic. The angular distributions of the emitted protons with energies above the Coulomb barrier increased in the forward direction. The results are compared with previous related experiments and possible sources of disagreement are discussed.