Abstract

The neutron-induced fission cross section of 242Pu has been measured in the neutron energy range from 2 eV to 10 MeV relative to the 235U(n, f) cross section. The CBNM electron linear accelerator was used as a pulsed-neutron source. The neutron-induced fission events were detected with an ionization chamber with ns timing. A large amount of structure is observed in the fission cross section up to 500 keV neutron energy, with isolated class II resonances being resolved below 70 keV. The fission cross section in the threshold region as well as the structures in the sub-barrier fission cross section are analysed with a common fission-barrier model.

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