Spectroscopic studies of the 238U(n,f) and 232Th(n,f) fission reactions with fast neutrons at LICORNE/nu-ball
Mercredi 4 octobre 2017 14:00
- Duree : 1 heure
Lieu : Seminar Room 7/8 - ILL 1, 71 avenue des Martyrs, Grenoble
Orateur : Jonathan WILSON (Institut de Physique Nucléaire (IPN) d'Orsay, France)
At the IPN Orsay we have recently developed LICORNE, an unusual kind of neutron source which produces high fluxes of directional fast neutrons using the p(7Li,n) inverse kinematics reaction. The natural directionality of the source opens up a whole range of new scientific opportunities.
In 2017 LICORNE will be coupled to the nu-ball high-resolution, hybrid Ge/LaBr3 spectrometer to perform spectroscopy of the most neutron-rich nuclei via fast neutron-induced fission of 238U(n,f) and 232Th(n,f). This permits the study of nuclear structure of very neutron-rich nuclei at higher spins than conventional RIB facilities can reach. The upcoming experimental campaign will be highly complementary to similar projects using thermal-neuron-induced fission of fissile nuclei (e.g. FIPPS @ ILL). The planned experiments will use a pulsed fast-neutron beam which allows measurements of fission yields at energies relevant for fast reactor applications (1 - 4 MeV) with spectroscopic methods. The use of high-resolution gamma-ray coincidence spectroscopy to measure fission yields is an under-developed technique which so far has been confined to measurements of spontaneous fission. Recent results on isotopic yield measurements for 238U(n,f) @ 2 MeV will be presented from a previous experiment with the LICORNE coupled to the Miniball spectrometer. Future possibilities and opportunities will be presented and discussed.
Contact : tellier@ill.fr
Discipline évènement : (Physique)
Entité organisatrice : (ILL)
Nature évènement : (Séminaire)
Evènement répétitif : (General ILL Seminar - College 3)
Site de l'évènement : Polygone scientifique
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