Summary of Recent Prompt Fission Neutron Spectra Measurements at LANSCE
ORAL
Abstract
Over the last decade, the Chi-Nu project has measured the Prompt Fission Neutron Spectra (PFNS) for neutron-induced fission of the major actinides, 235,238U and 239Pu. These measurements have been carried out at the Los Alamos Neutron Science CEnter (LANSCE), over incident neutron energies from below 1 MeV to 20 MeV. The target foils and fission detectors were provided by LLNL, and two LANL neutron detector arrays were used to cover outgoing neutron energies from 10 keV to 20 MeV. The measurements will be described, and the resulting PFNS data will be presented. In addition, PFNS measurements have now been extended to 240Pu(n,f) and 240,242Pu(sf). Comparisons among the PFNS of these isotopes will be discussed.
LA-UR-23-27458
LA-UR-23-27458
*This work was supported by the U.S. Department of Energy at Los Alamos National Laboratory under Contract No. 89233218CNA00000, and at Lawrence Livermore National Laboratory under Contract No. DE-AC52-07NA27344.
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Publication: Keegan J Kelly, Jaime A Gomez, Matthew Devlin, et al., Measurement of the 235U(n,f) prompt fission neutron spectrum from 10 keV to 10 MeV induced by neutrons of energy from 1 MeV to 20 MeV. Physical Review C, 105(4):044615, 2022
K. J. Kelly, M. Devlin, J. M. O'Donnell, et al., Measurement of the 239Pu(n,f) prompt fission neutron spectrum from 10 keV to 10 MeV induced by neutrons of energy 1–20 MeV. Physical Review C, 102(3):034615, 2020
Presenters
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Matthew J Devlin
- Los Alamos National Laboratory