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Report No.
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Neutron energy dependence of delayed neutron yields and its assessments

Minato, Futoshi  

Incident neutron energy dependence of delayed neutron yields of uranium and plutonium isotopes are investigated. A summation calculation of decay and fission yield data is employed, and the energy dependence of the latter part is considered in a phenomenological way. Our calculation systematically reproduces the energy dependence of delayed neutron yields by introducing an energy dependence of the most probable charge and the odd-even effect. We also tested modification of the evaluated fission yield data of the JENDL/FPY-2011 by replacing fission yields of some important delayed neutron precursors with those of the present result. New yield data show improvements in delayed neutron yield, not changing accuracy of the original decay heat calculation.

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Category:Nuclear Science & Technology

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