Application of Calorimetric Low-Temperature Detectors for the Investigation of Z-Yield Distributions of Fission Fragments
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ID: 96216
2018
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Abstract
In recent experiments, the new concept of calorimetric low-temperature detectors (CLTDs) was applied for the first time for the investigation of isotopic yields of fission fragments. Fragments from neutron-induced fission sources were mass-separated by the LOHENGRIN spectrometer at the ILL Grenoble and, after passing silicon nitride membranes used as degraders, detected in a CLTD array. The new detector concept of a thermal detector provides a fundamental advantage over conventional ionization-mediated detectors, in particular for heavier particle masses at low energies. Using fissile targets of 235U, 239Pu and 241Pu, nuclear-charge separation was studied in the mass region 82 ≤ A ≤ 139. For light fragments, the Z resolution matches historically best values with conventional techniques, while for heavier masses substantial improvement was attained. We have gained first LOHENGRIN data on the isotopic yields in the light-mass group of 241Pu. Towards mass-symmetry, known Z-yield data were supplemented in the range A = 110 to 113 for 241Pu and 239Pu. Extended data sets were cumulated for A = 92 and 96 due to a recent request from studies on the reactor anti-neutrino spectrum. Furthermore, considerable progress was achieved to extend isotopic yield measurements up to the heavy-mass region, hardly accessible until now.
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| Authors | Santwana, Dubey;Artur, Echler;Peter, Egelhof;Patrick, Grabitz;Manfred, Mutterer;Werner, Lauterfeld;Stefan, Stolte;Aurelien, Blanc;Ulli, Köster;Saskia, Kraft-Bermuth;Pascal, Scholz;Shawn, Bishop;Jose, Gomez;Friedrich, Gönnenwein; |
| Journal | epj web of conferences |
| Year | 2018 |
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