Abstract
Prompt fission gamma-ray spectra (PFGS) have been measured for the 239Pu(n,f) reaction using fast neutrons at Ēn=1.81 MeV produced by the LICORNE directional neutron source. The setup makes use of LaBr3 scintillation detectors and PARIS phoswich detectors to measure the emitted prompt fission gamma rays (PFG). The mean multiplicity, average total energy release per fission and average energy of photons are extracted from the unfolded PFGS. These new measurements provide complementary information to other recent work on thermal neutron induced fission of 239Pu and spontaneous fission of 252Cf.
Highlights
One of the key isotopes for present and future energy applications is the fissile nucleus 239Pu
Prompt fission gamma-ray spectra (PFGS) have been measured for the 239Pu(n,f) reaction using fast neutrons at En=1.81 MeV produced by the LICORNE directional neutron source
The mean multiplicity, average total energy release per fission and average energy of photons are extracted from the unfolded PFGS
Summary
One of the key isotopes for present and future energy applications is the fissile nucleus 239Pu. Results from the experiment will provide important nuclear data for reactor physics, e.g. as an input for gamma heating calculations and for a better understanding of gamma emission in the fission process. The program incorporates user-defined physical processes, which are p(7Li,n)7Be and p(11B,n)11C reactions, into the standard physics list provided by GEANT4 They are based on relativistic kinematic calculations and consider the experimental differential cross section data from literature [5, 6]. Multi-level splitting includes force collision (widely used in MCNP) and increasing the final neutron yields (encouraged by the GEANT4 example: bremsstrahlung splitting) All these un-physical techniques will need a weight to be corrected. This code has been validated by several experiments, e.g. the neutron time-of-flight (TOF) spectra measurement with liquid scintillation detectors from the EDEN array [8]
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.
