Independent isomeric yield ratios of fission products in the epi-cadmium neutron induced fission of 241Pu

Abstract

Abstract Independent isomeric yield ratios (IR) of 130,132 Sb, 131,133 Te, 134,136 I, 135 Xe and 138 Cs have been measured in the epi-cadmium neutron induced fission of 241 Pu by using an off-line gamma-ray spectrometric technique. The average neutron energy (< E n >) of the epi-cadmium reactor neutron spectrum is 1.9 MeV. From the IR values, root mean square fragment angular momenta ( J RMS ) were deduced by using spin dependent statistical model analysis. Effect of nuclear structure on J RMS values was examined. The present data in the epi-cadmium neutron induced fission of 241 Pu were compared with the similar data in the thermal neutron induced fission of 241 Pu to examine the role of excitation energy on fragment angular momentum.