Neutron-Induced Fission ofPu241

The neutron-induced fission cross section for ${\mathrm{Pu}}^{241}$ was measured at neutron energies between 0.25 and 21 Mev. The fission excitation function is similar to other even-odd fissionable nuclei and shows a cross section of 1.68±0.08 barns at 3 Mev. A rough correlation is developed from fission systematics which allows predictions of 3-Mev cross sections. ${\mathrm{U}}^{235}$ fission cross section values between 10 and 21 Mev (previously unpublished) are also tabulated.