The thermal-neutron fission cross section of237Np and the resonant fission integral

Neutron Thermal Cross Sections, Westcott Factors, Resonance Integrals, Maxwellian Averaged Cross Sections and Astrophysical Reaction Rates Calculated from the ENDF/B-VII.1, JEFF-3.1.2, JENDL-4.0, ROSFOND-2010, CENDL-3.1 and EAF-2010 Evaluated Data Libraries

“…To illustrate the point, the subthreshold fission integral of 237 Np is 0.650 b calculated from the resonance parameters [2] while the fission integrals with upper energy limits of 10 MeV and 20 MeV are 5.43 b and 6.95 b, respectively, on the basis of the ENDF/B-VII.1 evaluation. It is of interest that the only reported measured value for this nucleus gives a value of 4.70±0.23 b [68].…”

Neutron Thermal Cross Sections, Westcott Factors, Resonance Integrals, Maxwellian Averaged Cross Sections and Astrophysical Reaction Rates Calculated from Major Evaluated Data Libraries

“…To illustrate the point, the subthreshold fission integral of 237 N p is 0.650 b calculated from the resonance parameters [2] while the fission integrals with upper energy limits of 10 MeV and 20 MeV are 5.43 b and 6.95 b, respectively, on the basis of the ENDF/B-VII.1 evaluation. It is of interest that the only reported measured value for this nucleus gives a value of 4.70±0.23 b [67].…”

Study of the 240Pu(n,f) and 237Np(n,f) reaction cross sections at the new experimental area (EAR2) of the CERN n_TOF facility

“…In fig. 4.58 the individual cross sections are shown for each sample along with the only experimental point found in literature by Kozharin et al [83] and the current evaluations. It is evident that the cross sections derived from the JRC-Geel samples, although in very good agreement between them, were about twice as high as the corresponding one from IPN-Orsay which was in overall agreement with both the experimental points and the current evaluations.…”