Prompt γ rays emitted in fission of 226Ra by 12 MeV protons

The total energy associated with the emission of prompt γ rays in fission of 226 Ra induced by 12 MeV protons was measured in correlation with the fragment mass and kinetic energy. The dependence of the average total γ-ray energy on fragment mass and total kinetic energy resembles the corresponding dependence of the average number of neutrons. Using these results and the results for the average number of neutrons, we calculated the excitation energy of the fragments at the scission point. The results support the view that the scission-point configuration for the symmetric fission mode is more elongated than that for the asymmetric mode