Kinetic Energy Distributions of Fragments from the Fission of Au, Tl, Pb, and Bi

Single fragment and total kinetic energy distributions have been measured for fission induced by helium ions and deuterons in Au, Tl, Pb, and Bi targets. The average total kinetic energy release has the same proportionality with $\frac{Z^2}{A^{\frac{1}{3}}}$ found for fission of heavier elements. The widths for the total kinetic energy distributions are comparable to those observed for fission of heavy elements. A preliminary mass distribution curve has been obtained by measuring the energies of coincident fragments.