Some Studies of the Products of the High-Energy Fission Process

The energy dependence of the formation cross section of certain nuclides formed in fission of uranium and thorium has been studied. Excitation functions in the hundred-Mev region are given for ${\mathrm{Ni}}^{66}$, ${\mathrm{Zr}}^{97}$, ${\mathrm{Ag}}^{111}$, ${\mathrm{Ba}}^{131}$, and ${\mathrm{Ba}}^{139}$. Protons, deuterons, and alpha particles from the Berkeley 184-inch frequency-modulated synchrocyclotron were used to induce the activities.