Abstract
Accurate nuclear-data needs in the fast-neutron-energy region have been recently addressed for the development of next generation nuclear power plants (GEN-IV) by the OECD Nuclear Energy Agency (NEA). This sensitivity study has shown that of particular interest is the 242 Pu(n,f) cross section for fast reactor systems. Measurements have been performed with quasi-monoenergetic neutrons in the energy range from 15 MeV to 20 MeV produced by the Van de Graaff accelerator of the JRC-Geel. A twin Frisch-grid ionization chamber has been used in a back-to-back configuration as fission fragment detector. The 242 Pu(n,f) cross section has been normalized to 238 U(n,f) cross section data. The results were compared with existing literature data and show acceptable agreement within 5%.
Highlights
Accurate cross section data for neutron induced nuclear reactions are required for many fields of science, in the energy region up to about 20 MeV
Accurate nuclear-data needs in the fast-neutron-energy region have been recently addressed for the development of generation nuclear power plants (GEN-IV) by the OECD Nuclear Energy Agency (NEA)
Measurements have been performed with quasi-monoenergetic neutrons in the energy range from 15 MeV to 20 MeV produced by the Van de Graaff accelerator of the JRC-Geel
Summary
Accurate cross section data for neutron induced nuclear reactions are required for many fields of science, in the energy region up to about 20 MeV. A search of the EXFOR international database of experiments shows that only one set of experimental data exists above 15 MeV and 5 single point measurements between 14 MeV and 15 MeV [2]. Based on this scarcity, in the present work the 242Pu(n,f) cross section was measured at 6 incident neutron energies of 15.28 MeV, 16.16 MeV, 17.22 MeV, 18.02 MeV, 18.74 MeV and 19.81 MeV. That means that the cross section of one sample can be determined relatively to the other sample. A constant fraction discriminator was employed for setting of the electronic threshold for rejecting the signal from α particles
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
