Neutron elastic and inelastic cross section measurements on silicon from 0.8--8 MeV

Ramirez, A. P.D.; Peters, E. E.; Mukhopadhyay, S.; McEllistrem, M. T.; Yates, S. W.; Derdeyn, E. C.; Hicks, S. F.; Lyons, E. M.; Morin, T. J.; Vanhoy, J. R.

doi:10.1016/j.nuclphysa.2022.122474

Title: Neutron elastic and inelastic cross section measurements on silicon from 0.8--8 MeV

Journal Article · Mon May 16 00:00:00 EDT 2022 · Nuclear Physics. A

DOI:https://doi.org/10.1016/j.nuclphysa.2022.122474· OSTI ID:1867861

Ramirez, A. P.D. ^[1];

^[2]; Mukhopadhyay, S. ^[3]; McEllistrem, M. T. ^[1]; Yates, S. W. ^[1]; Derdeyn, E. C. ^[4];

^[5]; Lyons, E. M. ^[4]; Morin, T. J. ^[4];

^[6]

Univ. of Kentucky, Lexington, KY (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Kentucky, Lexington, KY (United States)
Univ. of Kentucky, Lexington, KY (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Georgia Institute of Technology, Atlanta, GA (United States)
Univ. of Dallas, Irving, TX (United States)
Univ. of Kentucky, Lexington, KY (United States); Univ. of Dallas, Irving, TX (United States)
US Naval Academy, Annapolis, MD (United States)

Neutron elastic and inelastic scattering differential cross sections were measured at angles between 30° and 155° with incident neutron energies between 0.8 and 8 MeV. The measured differential scattering cross sections are compared to existing measurements and the ENDF/B-VIII.0, the JEFF-3.3, and the JENDL-4.0 data evaluations, as well as theoretical calculations from the TALYS-1.95 nuclear reaction code. Our results are reasonably well described by values from the ENDF/B-VIII.0 and JEFF-3.3 compilations. However, below 4 MeV, our backward-angle elastic scattering results tend to be lower than database/calculated values, suggesting that less recoil damage would occur than expected. Above 6 MeV, larger backward-angle cross sections are observed suggesting the opposite. Deexcitation γ rays produced in the inelastic scattering process were also studied for neutron energies between 1.9 and 4.5 MeV. Inelastic neutron scattering cross sections deduced from ²⁸Si(n,n1γ) γ-ray projection cross sections confirm our ²⁸Si(n,n1) results. To the extent that data from GELINA and our experimental results can be compared, we have excellent agreement between the inelastic neutron scattering cross sections.

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Research Organization:: Univ. of Kentucky, Lexington, KY (United States); Univ. of Dallas, Irving, TX (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP); National Science Foundation (NSF)

Grant/Contract Number:: NA0002931; SC0021243; SC0021424; PHY-1913028; NU-12-KY-UK-0201-05

OSTI ID:: 1867861

Report Number(s):: DOE-USNA-00056, DOE-UD-21243, and DOE-UK-DE-21424; NU-12-KY-UK-0201-05, DE-20SSC000056, DE-SC0021243, and DE-SC0021424,PHY-1913028; TRN: US2306224

Journal Information:: Nuclear Physics. A, Vol. 1024; ISSN 0375-9474

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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