Neutron elastic and inelastic scattering differential cross sections on carbon

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 measur...

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Bibliographic Details
Published in:	Nuclear physics. A Vol. 1023; p. 122446
Main Authors:	Ramirez, A.P.D., Peters, E.E., Vanhoy, J.R., Hicks, S.F., Alasagas, L.A., Alcorn-Dominguez, D.K., Block, S.T., Byrd, S.T., Chouinard, E.A., Combs, B.M., Crider, B.P., Derdyn, E.C., Downes, L., Erlanson, J.A., Evans, S.E., French, A.J., Garza, E.A., Girgis, J., Harrison, T.D., Henderson, S.L., Howard, T.J., Jackson, D.T., Kersting, L.J., Kumar, A., Liu, S.H., Lueck, C.J., Lyons, E.M., McDonough, P.J., McEllistrem, M.T., Morin, T.J., Mukhopadhyay, S., Nguyen, T.A., Nickel, M., Nigam, S., Pecha, R.L., Potter, J., Prados-Estévez, F.M., Rice, B.G., Ross, T.J., Santonil, Z.C., Schneiderjan, J., Sidwell, L.C., Sigillito, A.J., Steves, J.L., Thompson, B.K., Watts, D.W., Xiao, Y., Yates, S.W.
Format:	Journal Article
Language:	English
Published:	United States Elsevier B.V 01-07-2022 Elsevier
Subjects:	[formula omitted]C(n,n′) Differential cross sections Legendre coefficients natC(n,n') Neutron elastic and inelastic scattering NUCLEAR FUEL CYCLE AND FUEL MATERIALS NUCLEAR PHYSICS AND RADIATION PHYSICS Legendre coefficients Neutron elastic and inelastic scattering Differential cross sections natC(n,n′)
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Summary:	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 ∼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.
Bibliography:	USDOE Office of Science (SC), Nuclear Physics (NP) 89243020SSC000056 USDOE National Nuclear Security Administration (NNSA) USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP)
ISSN:	0375-9474
DOI:	10.1016/j.nuclphysa.2022.122446