Abstract
The fission cross section of 238Pu was measured in the neutron energy range from 5 eV to 10 MeV. Several methods of neutron production were employed using the Van de Graaff and the electron linear accelerator of the CBNM. The neutron induced fission events were detected with a specially designed ionization chamber that permitted discrimination against the high α-activity of the 238Pu sample. The fission cross section was measured relative to the 235U(n,f) cross section above 100 keV and at lower neutron energies relative to the 6Li(n,t)4He cross section shape, however normalized between 7.8 eV and 11.0 eV to the known resonance fission integral of 235U.
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