A new proposed method for measuring 14-MeV neutron fission yields is through a fission-proxy reaction method, an indirect process for creating the same compound nucleus as that produced from 14-MeV neutrons. It is based primarily on the Bohr-independence hypothesis, also known as the compound-nucleus model, which states that the compound nucleus will decay into its reaction products independent of its formation process. This proposed fission-proxy method may be validated by measuring fission yields from 25.6 MeV α-induced fission of Th-232, which simulates the same excited compound nucleus (U-236*, E*=20.6 MeV) as that produced from 14-MeV neutrons on U-235 with a large overlap in the angular momentum distributions. Since the literature data for the Th-232 system is limited, a series of α-induced fission yield measurements on Th-232 were performed using the accelerator located at the Center for Accelerator Mass Spectrometry at Lawrence Livermore National Laboratory. These experimentally measured fission yields were compared to the evaluated England and Rider fission yields for 14-MeV neutrons on U-235 in order to assess the validity of the fission-proxy approach. The results from this detailed comparison will be presented.<br/>

Application of the Bohr-independence hypothesis for the measurement of fission yields

253rd National Meeting (2017)

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