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Subthreshold Fission Cross Section of 237Np

F. Tovesson, T. S. Hill

Nuclear Science and Engineering

Volume 159 / Number 1 / May 2008 / Pages 94-101


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An experimental program has been developed at Los Alamos Neutron Science Center to precisely measure fission cross sections relevant to advanced nuclear reactor designs and transmutation concepts. The first completed measurement is of 237Np(n,f), and the subthreshold part of the measurement is reported here. The JENDL-3.3 evaluation agrees well with the experimental results in the unresolved resonance region, where a discrepancy between the ENDF/B-VI and JENDL-3.3 evaluations exists.

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