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Title: Newly Evaluated Neutron Reaction Data on Chromium Isotopes

Journal Article · · Nuclear Data Sheets
 [1]; ORCiD logo [2];  [1];  [3];  [4]; ORCiD logo [2];  [1];  [5];  [1]; ORCiD logo [2];  [4];  [6];  [6]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. International Atomic Energy Agency (IAEA), Vienna (Austria)
  4. Jozef Stefan Inst. (IJS), Ljubljana (Slovenia)
  5. Gonzaga Univ., Spokane, WA (United States)
  6. Alternative Energies and Atomic Energy Commission (CEA), Saint-Paul-Lez-Durance (France)
+ Show Author Affiliations

In this work, 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 50,53Cr 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 52Cr 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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
Grant/Contract Number:
AC05-00OR22725; SC0012704
OSTI ID:
1798579
Alternate ID(s):
OSTI ID: 1788066
Report Number(s):
BNL-221625-2021-JAAM; TRN: US2210690
Journal Information:
Nuclear Data Sheets, Vol. 173; ISSN 0090-3752
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (58)

FIG. 1(p. 3)figure FIG. 1
FIG. 2(p. 3)figure FIG. 2
FIG. 3(p. 4)figure FIG. 3
FIG. 4(p. 5)figure FIG. 4
FIG. 5(p. 5)figure FIG. 5
FIG. 6(p. 6)figure FIG. 6
FIG. 7(p. 6)figure FIG. 7
FIG. 8(p. 6)figure FIG. 8
TABLE I(p. 6)table TABLE I
FIG. 10(p. 7)figure FIG. 10
FIG. 9(p. 7)figure FIG. 9
FIG. 11(p. 8)figure FIG. 11
FIG. 12(p. 8)figure FIG. 12
FIG. 13(p. 8)figure FIG. 13
FIG. 14(p. 9)figure FIG. 14
TABLE II(p. 9)table TABLE II
TABLE III(p. 9)table TABLE III
TABLE IV(p. 10)table TABLE IV
TABLE V(p. 10)table TABLE V
TABLE VI(p. 11)table TABLE VI
TABLE VII(p. 11)table TABLE VII
FIG. 15(p. 12)figure FIG. 15
FIG. 16(p. 12)figure FIG. 16
TABLE VIII(p. 12)table TABLE VIII
FIG. 17(p. 13)figure FIG. 17
FIG. 18(p. 15)figure FIG. 18
FIG. 19(p. 16)figure FIG. 19
FIG. 20(p. 17)figure FIG. 20
TABLE IX(p. 17)table TABLE IX
TABLE X(p. 18)table TABLE X
FIG. 21(p. 19)figure FIG. 21
TABLE XI(p. 19)table TABLE XI
FIG. 22(p. 20)figure FIG. 22
FIG. 23(p. 20)figure FIG. 23
TABLE XII(p. 20)table TABLE XII
FIG. 24(p. 21)figure FIG. 24
FIG. 25(p. 23)figure FIG. 25
FIG. 26(p. 24)figure FIG. 26
FIG. 27(p. 24)figure FIG. 27
FIG. 28(p. 25)figure FIG. 28
FIG. 29(p. 26)figure FIG. 29
FIG. 30(p. 26)figure FIG. 30
FIG. 31(p. 26)figure FIG. 31
FIG. 32(p. 27)figure FIG. 32
FIG. 33(p. 27)figure FIG. 33
FIG. 34(p. 27)figure FIG. 34
FIG. 35(p. 27)figure FIG. 35
FIG. 36(p. 28)figure FIG. 36
FIG. 37(p. 28)figure FIG. 37
FIG. 38(p. 29)figure FIG. 38
FIG. 39(p. 29)figure FIG. 39
TABLE XIII(p. 30)table TABLE XIII
FIG. 40(p. 31)figure FIG. 40
FIG. 41(p. 32)figure FIG. 41
FIG. 42(p. 32)figure FIG. 42
FIG. 43(p. 33)figure FIG. 43
FIG. 44(p. 33)figure FIG. 44
FIG. 45(p. 33)figure FIG. 45

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