| Request ID | 7 | Type of the request | General request | ||
|---|---|---|---|---|---|
| Target | Reaction and process | Incident Energy | Secondary energy or angle | Target uncertainty | Covariance |
| 26-FE-56 | (n,xn) SIG,DDX | 7 MeV-20 MeV | 1MeV-20MeV | 30 | |
| Field | Subfield | Created date | Accepted date | Ongoing action | Archived Date |
| Fission,ADS | Shielding, Medical, SNS | 13-JUL-06 | 16-APR-07 | 16-MAY-18 | |
Send a comment on this request to NEA.
Requester: Prof. Arjan KONING at NRGPETTEN, NED
Email:
Project (context): JEFF, Model calculations
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Accuracy:
Justification document:
Comment from requester:
Review comment:
Entry Status:
Main recent references: Experiments Theory/Evaluation
New double differential experimental data for the Fe(n,xn) reaction will allow a crucial test of the pre-equilibrium models underlying neutron transport libraries for spallation neutron sources. They will thereby enhance the confidence in neutron transport calculations for spallation neutron sources such as envisioned for accelerator driven systems.
30% for the double-differential spectra
A global pre-equilibrium analysis from 7 to 200 MeV based on the optical model potential, A.J. Koning and M.C. Duijvestijn,
Nucl. Phys. A744, 15 (2004).
There are hundreds of (p,xp) and (p,xn) spectra in the 20-200 MeV range available, several (n,xp) spectra, but there are basically no
double-differential (n,xn) spectra available. The presence of such data would heavily constrain the pre-equilibrium model parameters and thereby result in a much better prediction of neutron-induced spectra in the entire 50-200 MeV range. Since high-energy spectra are rather structureless the choice of target is less essential.
Completed (as of SG-C review of May 2018) - The experimental program performed at Uppsala [Sagrado:2011] combined with improvements in nuclear reaction models allow modern evaluations to address this request, see e.g. [Herman:2018].
Please report any missing information to hprlinfo@oecd-nea.org
