Fission Fragment Angular Distribution of ~(232)Th(n,f) at the CERN n_TOF Facility

摘要

The angular distribution of fragments emitted in neutron-induced fission of ~(232)Th was measured in the white spectrum neutron beam at the n_TOF facility at CERN. A reaction chamber based on Parallel Plate Avalanche Counters (PPAC) was used, where the detectors and the targets have been tilted 45° with respect to the neutron beam direction in order to cover the full angular range of the fission fragments. A GEANT4 simulation has been developed to study the setup efficiency. The data analysis and the preliminary results obtained for the ~(232)Th(n,f) between fission threshold and 100 MeV arc presented here.