Dependence of the angular momenta of fission fragments on their nuclear structure

In order to investigate the influence of the nuclear structure of a fission fragment on the scission configuration, angular momenta of 135I fragment have been deduced from the radiochemically determined independent isomeric yield ratios of 134I in the fission of 233U, 235U, 239Pu and 241Pu induced by thermal neutrons. An odd-even effect observed in the angular momentum of the fragment indicates a greater extent of deformation in the odd-Z fragments; the angular momentum of the 135I fragment decreases when the neutron number of the complementary fragment approaches the 66 n deformed shell configuration. (orig.)