Neutron-induced fission cross section of $^{234}\mathrm{U}$ and $^{237}\mathrm{Np}$ measured at the CERN Neutron Time-of-Flight (n_TOF) facility

Neutron-induced fission cross section of ${}^{234}U$ and ${}^{237}{Np}$ measured at the CERN Neutron Time-of-Flight (n_TOF) facility

C. Paradela et al. (n_TOF Collaboration)

Phys. Rev. C 82, 034601 – Published 8 September 2010

Abstract

A high-resolution measurement of the neutron-induced fission cross section of ${}^{234}U$ and ${}^{237}{Np}$ has been performed at the CERN Neutron Time-of-Flight facility. The cross sections have been determined in a wide energy range from 1 eV to 1 GeV using the evaluated ${}^{235}U$ cross section as reference. In these measurements the energy determination for the ${}^{234}U$ resonances could be improved, whereas previous discrepancies for the ${}^{237}{Np}$ resonances were confirmed. New cross-section data are provided for high neutron energies that go beyond the limits of prior evaluations, obtaining important differences in the case of ${}^{237}{Np}$ .