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New prompt fission neutron spectra measurements in the $^{238}$U(n,f) reaction with a dedicated setup at LANSCE/WNR
- Source :
- EPJ Web Conf., ND 2016 International Conference on Nuclear Data for Science and Technology, ND 2016 International Conference on Nuclear Data for Science and Technology, Sep 2016, Bruges, Belgium. pp.04014, ⟨10.1051/epjconf/201714604014⟩, EPJ Web of Conferences, Vol 146, p 04014 (2017)
- Publication Year :
- 2016
- Publisher :
- HAL CCSD, 2016.
-
Abstract
- International audience; A new prompt fission neutron spectra (PFNS) measurement in the 238U(n,f) reaction was performed at LANSCE/WNR facility. Evaluated data show discrepancies on the low (below 1 MeV) and high (above 5 MeV) energy parts in the PFNS for different major and minor actinides. The goal is to improve these measurements in a wide range of incident energy. The energy of the incoming neutron, inducing the fission, and the prompt neutron energies, are measured by time-of-flight method. A dedicated fission chamber was developed, in order to improve alpha-fission discrimination, timing resolution, actinide mass, and to reduce the amount of neutron scattering. To detect prompt neutrons, the 54 Chi-Nu scintillator cells array were surrounding the fission chamber. High statistics were recorded during this experiment, allowing a precise study of PFNS behavior as a function of incident neutron energy, from 1 MeV to 200 MeV. This experiment also showed that all the new tools developed to improve PFNS measurements are performing. Therefore, measurements of PFNS with others actinides such as 239Pu are planned.
- Subjects :
- Nuclear reaction
Physics
010308 nuclear & particles physics
Fission
QC1-999
Astrophysics::High Energy Astrophysical Phenomena
Nuclear Theory
Neutron scattering
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
01 natural sciences
Neutron temperature
Nuclear physics
Uranium-238
Prompt neutron
0103 physical sciences
Neutron detection
Neutron
010306 general physics
Nuclear Experiment
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- EPJ Web Conf., ND 2016 International Conference on Nuclear Data for Science and Technology, ND 2016 International Conference on Nuclear Data for Science and Technology, Sep 2016, Bruges, Belgium. pp.04014, ⟨10.1051/epjconf/201714604014⟩, EPJ Web of Conferences, Vol 146, p 04014 (2017)
- Accession number :
- edsair.doi.dedup.....b1f6400390a5673d2891e7d3366edd58