4.2 Article

Neutron elastic and inelastic scattering differential cross sections on carbon

期刊

NUCLEAR PHYSICS A
卷 1023, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.nuclphysa.2022.122446

关键词

Neutron elastic and inelastic scattering; Differential cross sections; natC(n; nh); Legendre coefficients

资金

  1. U.S. Department of Energy [NA-0002931]
  2. Nuclear Energy Universities Program award [NU-12-KY-UK-0201-05]
  3. Office of Nuclear Physics [DE-20SSC000056, DE-SC0021243, DE-SC0021175, DE-SC0021424]
  4. Donald A. Cowan Physics Fund at the University of Dallas [PHY-1913028]
  5. National Science Foundation
  6. U.S. Department of Energy (DOE) [DE-SC0021243, DE-SC0021175] Funding Source: U.S. Department of Energy (DOE)

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Elastic and inelastic neutron scattering angular distributions were measured on natural carbon samples to confirm existing experimental data and evaluations, and guide improvements in resonance parameters if necessary. The results largely agree with existing values, but show some deviations in certain energy ranges. These data will aid in refining the description of carbon samples in neutron scattering.
Elastic and inelastic neutron scattering angular distributions were measured on natural carbon samples to confirm existing experimental data and evaluations in the fast neutron region and to guide improvements in resonance parameters, where needed. Sixty-four (n,n') differential cross section measurements were performed at 45 incident neutron energies between 0.5 and 8.0 MeV. Experimental angle-integrated elastic scattering cross sections are consistent with ENDF/B-VIII.0 values with the exception of the region from 3.2 to 4.0 MeV where our results are & SIM;3% higher. In the 3.4 to 3.6 MeV region our differential cross sections are slightly lower at forward angles and somewhat higher at backward angles than the ENDF/B-VIII.0 calculations; however, our results are consistent with measured data from other research groups. The first-through fourth-order elastic scattering Legendre coefficients from fits to these experimental data are consistent with ENDF/B-VIII.0 values across this range of incident neutron energies. Inelastic scattering cross sections were measured at 12 incident neutron energies between 5.6 and 7.8 MeV. Angle-integrated cross sections agree well with the 1978 Perey and ENDF/B-VIII.0 values; however, the angular-distribution shapes deviate somewhat from the ENDF/B-VIII.0 calculations. These data will allow refinement of the resonance parameter description in this difficult energy region. Published by Elsevier B.V.

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