Studies forγ-ray emission in the fission process with LICORNE

Abstract

Abstract. The LICORNE neutron source is a new device at the ALTO facility. Its use of inverse kinematics makes the production of naturally focused neutron beams possible with an energy range of 0.5 to 4 MeV. This is perfect for any studies concerning fast neutron induced reaction based on detection setup that require to be placed in a compact geometry -such as Ge based γ detection setup. In this paper, neutron production with LICORNE is described. The development of a gas cell target and the extension of the energy range up to 7 MeV with the p( 11 B,n) 11 C are presented. An overview of the major research fields studied with LICORNE is given and two types of experiment are presented. The first one dedicated to prompt fission γ-ray emission in fission, as a function of incident neutron energy, is described. Some preliminary results are shown. The second, in the context of the MINORCA campaign, is detailed. The most recent outcomes in the data analysis process are also presented.

Statistical study of the prompt-fission γ -ray spectrum for U238(n, f ) in the fast-neutron region

“…While recent measurements have focused on thermalneutron-induced fission [10][11][12] and spontaneous fission [13,14], very little PFG information exists for fast-neutroninduced fission [15,16]. In this work PFGS and their average characteristics for fast-neutron-induced fission on 238 Uw e r e studied at energies of 1.9 MeV and 4.8 MeV to gain information on the possible energy dependence of PFG characteristics below second chance fission at 6 MeV.…”