Conférences et séminaires » Séminaire présenté par Michael Jentschel, ILL Grenoble
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Gamma Ray Spectroscopy at external neutron beams of the ILL
Par : Michael Jentschel, ILL Grenoble
Date : jeudi 6 juin 2013 à 10h30
Lieu : IPHC, Salle de Réunion 2e étage du Bâtiment 27
Gamma ray spectroscopy at external neutron beams offers unique possibilities for nuclear structure studies. The present talk summarizes the recent efforts within the EXILL campaign, in which a highly efficient HPGe detector cluster was put around an intense cold neutron beam. The setup consisted of 8 clover detectors from the EXOGAM cluster, 6 coaxial detectors from the GASP cluster and 2 ILL clover detectors. All detectors were mounted with AntiCompton shields at a close distance to a sample to allow prompt spectroscopy studies. Data were taken with a trigger free digital acquisition system. The campaign included several detailed (n,gamma) studies and spectroscopy of fission products populated in neutron induced fission of 235U and 241Pu. Lifetime measurements with the fast timing technique using 16 LaB3 scintillators in combination with 8 clover detectors were also done. A brief overview of the performance of such a setup at a neutron beam will be given by comparing some preliminary results to measurements from spontaneous fission sources. In the second part an outlook towards further developments for multi detector setups at neutron beams will be given. Here the concept of the ILL project FIPPS will be introduced. This project represents the combination of a fission fragment mass spectrometer with a HPGe-detector cluster. Possible configurations of FIPPS to study nuclear fission or to perform nuclear spectroscopy will be discussed.
Personne à contacter : Kamilia SIEJA