Independent isomeric yield ratios of fission products in the epi-cadmium neutron induced fission of U.

The independent isomeric yield ratios (IR) of Sb, Te, I, Xe and Cs have been measured in the epi-cadmium neutron induced fission of U by using an off-line gamma-ray spectrometric technique. The average neutron energy of the epi-cadmium reactor neutron spectrum is 1.9 MeV. The root mean square fragment angular momenta (J) were deduced from the IR values by using spin dependent statistical model analysis. The IR and J values of considered fission products in the epi-cadmium neutron induced fission of U were compared with the literature data in the thermal neutron induced fission of U to examine the influence of excitation energy on nuclear structure effect.