Neutron-induced fission cross sections for natPb and 209Bi 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 235U and 238U 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.
|Titolo:||Neutron-induced fission cross section of natPb and 209_Bi from threshold to 1 GeV: An improved parametrization|
|Data di pubblicazione:||28-apr-2011|
|Appare nelle tipologie:||1.1 Articolo in rivista|