Determination of the fast-neutron-induced fission cross-section of ²⁴²Pu at nELBE

Abstract

Abstract. The fast-neutron-induced fission cross section of 242 Pu was determined in the energy range of 0.5 MeV to 10 MeV at the neutron time-of-flight facility nELBE. Using a parallel-plate fission ionization chamber this quantity was measured relative to 235 U(n,f). The number of target nuclei was thereby calculated by means of measuring the spontaneous fission rate of 242 Pu. An MCNP 6 neutron transport simulation was used to correct the relative cross section for neutron scattering. The determined results are in good agreement with current experimental and evaluated data sets.