ID | 100 |
---|---|
Type | |
Target | 92-U-235 |
Reaction | (n,f) (p,f) |
Quantity | SIG - Cross section |
Incident energy | 100 MeV - 500 MeV |
Accuracy | 5 % |
Field(s) | Standard |
Subfield | ADS |
Accepted date | 11-Apr-2018 |
Status | Work in progress |
Latest review date | 22-Apr-2022 |
Dr Roberto CAPOTE NOY at IAEA, AUT
ImpactImprovements in the standard cause all measurements relative to that standard to be improved. See Ref. [1].
Accuracy5% of the cross-section
Justification documentThere are discrepancies (see Fig. 24 in section III.E, pp.161-162 of Ref. [1]) between different theoretical calculations, data estimated from the (p,f) reaction, and the only measured data set of U-238(n,f) cross section at those energies [2]. New measurements of absolute cross sections of U-235 or U-238 (n,f) and/or U-235 or U-238 (p,f) reactions in the energy range where pion channels begin to play an important role (100-500 MeV) are needed to solve the discrepancies and to reduce the uncertainties of the Neutron Standards in that energy range.
References
At high-energy the (n,f) cross-section can be inferred with rather low uncertainty from (p,f) cross-section measurements, and thanks to this can be used in the neutron standards evaluation.
Entry statusWork in progress (as of SG-C review of May 2018)
Main recent referencesPlease report any missing information to hprlinfo@oecd-nea.org
Experiments
Theory/Evaluation