Neutron-induced fission cross sections of {sup 209}Bi and {sup 238}U in the intermediate energy region

Measurements of neutron-induced fission cross sections for {sup 209}Bi and {sup 238}U have been performed for neutron energies of 135 and 160 MeV at the quasi-monoenergetic neutron beam facility at The Svedberg Laboratory in Uppsala using the {sup 7}Li(p,n) reaction as the neutron source. The fission fragments were detected by thin film breakdown counters. The neutron flux was measured relative to the n-p scattering cross section by a proton recoil detector. The preliminary results are compared with calculations using the LAHET code as well as with data from other works.