Evaluation of 50Cr, 52Cr, 53Cr, 54Cr Neutron Cross Section Data for Energies up to 200 MeV

Pereslavtsev, P.; Konobeyev, A. Yu.; Fischer, U.; Leal, L.C.

doi:10.3938/jkps.59.931

Cited by 3 publications

(3 citation statements)

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“…New evaluated data files were prepared for n + 50,52,53,54 Cr interactions for the JEFF-3.2 release [160]. With one modification to the evaluation of n + 52 Cr data these were adopted for JEFF-3.…”

Section: Chromiummentioning

confidence: 99%

“…In the fast energy range the data for n + 52 Cr were evaluated up to 150 MeV using the GNASH code while the data for n+ 50,53,54 Cr were evaluated with TALYS-1.0 up to 200 MeV using the geometry dependent hybrid pre-equilibrium model [162]. Particular attention was paid to reproducing the available experimental data for the total cross section and the (n,xn), (n,xp) and (n,xα) channels especially when these lead to radioactive residual nuclei [160]. Figure 27 shows the evaluation compared with data for the 52 C(n,2n) [163-172] and 52 Cr(n,p) [164,169,170,[172][173][174][175][176] reactions and for the production of protons and alphas on natural chromium.…”

Section: Chromiummentioning

confidence: 99%

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The joint evaluated fission and fusion nuclear data library, JEFF-3.3

et al. 2020

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The joint evaluated fission and fusion nuclear data library 3.3 is described. New evaluations for neutroninduced interactions with the major actinides 235 U, 238 U and 239 Pu, on 241 Am and 23 Na, 59 Ni, Cr, Cu, Zr, Cd, Hf, W, Au, Pb and Bi are presented. It includes new fission yields, prompt fission neutron spectra and average number of neutrons per fission. In addition, new data for radioactive decay, thermal neutron scattering, gamma-ray emission, neutron activation, delayed neutrons and displacement damage are presented. JEFF-3.3 was complemented by files from the TENDL project. The libraries for photon, proton, deuteron, triton, helion and alpha-particle induced reactions are from TENDL-2017. The demands for uncertainty quantification in modeling led to many new covariance data for the evaluations. A comparison between results from model calculations using the JEFF-3.3 library and those from benchmark experiments for criticality, delayed neutron yields, shielding and decay heat, reveals that JEFF-3.3 performes very well for a wide range of nuclear technology applications, in particular nuclear energy.

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Section: Chromiummentioning

confidence: 99%

Section: Chromiummentioning

confidence: 99%

The joint evaluated fission and fusion nuclear data library, JEFF-3.3

et al. 2020

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“…The evaluated data for the chromium isotopes released in the ENDF/B-VIII.0 library followed recent measurements [4] and evaluation efforts [5] in support of the U.S. Department of Energy (DOE) Nuclear Criticality Safety Program (NCSP) with particular focus in the resolved resonance region. In the intermediate and high energy region, although the recent work by Pereslavtsev [6] is currently included in the JEFF-3.3 library [7], ENDF/B-VIII.0 library [8] still relies on the work performed in 1997 by Chiba and released in the ENDF/B-VI.1 library [9,10], which was extended to 200 MeV. The current evaluation is limited to 20 MeV.…”

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confidence: 99%

Newly Evaluated Neutron Reaction Data on Chromium Isotopes

Nobre,

Pigni,

Brown

et al. 2021

Preprint

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Neutron reaction data for the set of major chromium isotopes were reevaluated from the thermal energy range up to 20 MeV. In the low energy region, updates to the thermal values together with an improved R-matrix analysis of the resonance parameters characterizing the cluster of large s-wave resonances for 50,53 Cr isotopes were performed. In the intermediate and high energy range up to 20 MeV, the evaluation methodology used statistical nuclear reaction models implemented in the EMPIRE code within the Hauser-Feshbach framework to evaluate the reaction cross sections and angular distributions. Exceptionally, experimental data were used to evaluate relevant cross sections above the resonance region up to 5 MeV in the major 52 Cr isotope. Evaluations were benchmarked with Monte Carlo simulations of a small suite of critical assemblies highly sensitive to Chromium data, and with the Oktavian shielding benchmark to judge deep penetration performance with a 14-MeV D-T neutron source. A significant improvement in performance is demonstrated compared to existing evaluations.

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