Investigation of neutron emission through the local odd-even effect as a function of the fission product kinetic energy

A recent experimental campaign was completed at the LOHENGRIN spectrometer. It was dedicated to the determination of the local odd-even effect as a function of the fission product kinetic energy for a given mass. We discuss here the mass A = 139 produced from the thermal neutron induced fission of Pu-241. A comparison with the Monte Carlo code FIFRELIN allows one to interpret these data in regards to the neutron emission process. The long term goal is to test and validate the phenomenological temperature ratio law used in FIFRELIN to split the total excitation energy between both fission fragments.