TY - JOUR AU - n_TOF Collaboration (Tarrio D. et al.) AU - Domingo-Pardo, C. AU - Tain, J. L. PY - 2011 DA - 2011// TI - Neutron-induced fission cross section of Pb-nat and Bi-209 from threshold to 1 GeV: An improved parametrization T2 - Phys. Rev. C JO - Physical Review C SP - 044620 EP - 9pp VL - 83 IS - 4 PB - Amer Physical Soc AB - Neutron-induced fission cross sections for Pb-nat and Bi-209 were measured with a white-spectrum neutron source at the CERN Neutron Time-of-Flight (n_TOF) facility. The experiment, using neutrons from threshold up to 1 GeV, provides the first results for these nuclei above 200 MeV. The cross sections were measured relative to U-235 and U-238 in a dedicated fission chamber with parallel plate avalanche counter detectors. Results are compared with previous experimental data. Upgraded parametrizations of the cross sections are presented, from threshold energy up to 1 GeV. The proposed new sets of fitting parameters improve former results along the whole energy range. SN - 0556-2813 UR - https://doi.org/10.1103/PhysRevC.83.044620 DO - 10.1103/PhysRevC.83.044620 LA - English N1 - ISI:000290163300003 ID - n_TOFCollaborationTarrioD.etal._etal2011 ER -