| Request ID | 100 | Type of the request | Special Purpose Quantity | ||
|---|---|---|---|---|---|
| Target | Reaction and process | Incident Energy | Secondary energy or angle | Target uncertainty | Covariance |
| 92-U-235 | (n,f),(p,f) SIG | 100 MeV-500 MeV | 5 | Y | |
| Field | Subfield | Created date | Accepted date | Ongoing action | Archived Date |
| Standard | ADS | 23-MAR-18 | 11-APR-18 | Y | |
Send a comment on this request to NEA.
Requester: Dr Roberto CAPOTE NOY at IAEA, AUT
Email: roberto.capotenoy@iaea.org
Project (context):
Impact: Improvements in the standard cause all measurements relative to that standard to be improved. See Ref. [1].
Accuracy: 5% of the cross-section
Justification document: There 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
Comment from requester: 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.
Review comment:
Entry Status:
Main recent references: Experiments Theory/Evaluation
Work in progress (as of SG-C review of May 2018)
Please report any missing information to hprlinfo@oecd-nea.org
