Speaker
Description
At the JRC GELINA facility, an extensive experimental program on neutron-induced scattering cross sections is being carried out with the ELISA (ELastic and Inelastic Scattering Array) setup. The original version of the array included a 235U fission chamber for the measurement of the incoming neutron flux and 32 organic liquid scintillators for the detection of the scattered neutrons. The detectors are placed in eight different scattering angles, which allows the user to extract the total and the differential cross section. As of recently, the setup has been upgraded by the addition of 6Li-glass detectors, in an attempt to extend the low-energy neutron detection limit below 1 MeV. To commission the new components of the setup, neutron elastic scattering measurements on natC were performed.
Carbon is widely used in nuclear technology, particularly in reactors where graphite is used as a moderator and reflector. It is also considered for structural applications in advanced reactor designs. Therefore, accurate neutron data are essential for their safe and efficient operation.
On the other hand, numerous laboratories use measurements of the neutron elastic scattering cross section of carbon to calibrate detectors, assess their stability, and validate experimental results. Carbon is suitable for such applications due to the cross section being accurately known with an uncertainty less than 1% up to 4.8 MeV incident neutron energy. Additionally, the IAEA (International Atomic Energy Agency) indicates the differential cross section as a standard for neutron energies of 1 keV to 1.8 MeV.
In this presentation, the analysis procedure along with preliminary results for the differential cross section of neutron elastic scattering by natC will be presented.
| Session | Microscopic and Integral Measurements |
|---|