ID | 7 |
---|---|
Type | G - General request |
Target | 26-Fe-56 |
Reaction | (n,xn) |
Quantity | SIG - Cross section DA/DE - Double differential probability distribution by angle and energy |
Incident energy | 7 MeV - 20 MeV |
Accuracy | 30 % |
Secondary Energy/Angle | 1MeV-20MeV |
Field(s) | Fission, ADS |
Subfield | Shielding, Medical, SNS |
Accepted date | 16-Apr-2007 |
Status | Archived |
Latest review date | 28-Apr-2022 |
Prof. Arjan KONING at NRGPETTEN, NED
Project (context)JEFF, Model calculations
ImpactNew 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.
Accuracy30% for the double-differential spectra
Justification documentA 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).
Comment from requesterThere 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.
Entry statusCompleted (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].
Main recent referencesPlease report any missing information to hprlinfo@oecd-nea.org
Experiments
Theory/Evaluation