Abstract
The feasibility of retrieving accurate fission observables with a Ge-detector array around a fissile target placed in a cold neutron beam was tested. In three measurement campaigns performed at ILL with the EXILL setup, 235 U and 241 Pu targets were placed in the high flux cold neutron beam available at the PF1B neutron guide. Gamma-rays following fission were detected by an array of 16 Ge detectors. In the following study, part of data was analyzed as a proof of principle. A set of yields belonging to the Kr-Ba pair were extracted using a gamma-gamma coincidence technique. Preliminary results were compared to the predictions of two phenomenological models: GEF and FIFRELIN.
Highlights
In three measurement campaigns performed at ILL with the EXILL setup, 235U and 241Pu targets were placed in the high flux cold neutron beam available at the PF1B neutron guide
We report on a study to assess the possibility of retrieving fission fragment pair yields from the data collected with EXILL
Concerning the practical determination of these specific fission yields with the data collected with an array of Ge detectors, several studies exist, at least two independent ones collected with a spontaneous fission source of 252Cf [2,3], one on the fission of 232Th (through the reaction 208Pb(18O,f)) [4] and one with low statistics on 235U(nth,f) [5]
Summary
EPJ Web of Conferences observables of interest for nuclear technology. We report on a study to assess the possibility of retrieving fission fragment pair yields from the data collected with EXILL. Another observable under interest is the γ-ray cascade itself, i.e. the population of the nuclear level scheme at high energy and angular momentum as a result of the fission process and its decay to the ground state
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