Fission of Elements from Pt to Bi by High Energy Neutrons

Abstract
The neutron beam of the 184-inch cyclotron has been used to produce fission in elements from Pt to Bi. The atomic fission yields relative to thorium for 84-Mev neutrons are bismuth 0.019, lead 0.0055, thallium 0.0032, mercury 0.0023, gold 0.0020, and platinum 0.0009. Yield curves for reduced neutron energies were determined. Significant differences in the fission yields of the abundant lead isotopes were found. With 84-Mev neutrons the maximum fission fragment ionization relative to thorium was 0.8 for bismuth and ranged down to about 0.7 for gold.