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Multilayer phoswich scintillators for neutron / gamma discrimination

Romain Coulon 1 Vladimir Kondrasovs 1 Quentin Lecomte 1 Jonathan Dumazert 1
1 LCAE - Laboratoire Capteurs et Architectures Electroniques
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
Abstract : MultiLayer Phoswich (MLP) scintillators have been studied for fission neutron detection by Monte-Carlo simulations and experimental tests. n/γ discrimination behavior of these systems and their angular dependencies have been characterized. The possibility to carry on a neutron counting system based of such an approach has been proven, and according to the results, an optimal thickness of layers for fission neutron counting was found around [100–150] μm. But, contrary to current liquid or solid-state discrimination scintillators, it appears that MLP-based neutron counting systems cannot directly classify neutron and gamma-ray interaction events from pulse shape analysis. To operate properly, it is therefore required to implement a compensation algorithm in the system readout.
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Submitted on : Thursday, November 8, 2018 - 10:34:15 AM
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Romain Coulon, Vladimir Kondrasovs, Quentin Lecomte, Jonathan Dumazert. Multilayer phoswich scintillators for neutron / gamma discrimination. Radiation Measurements, Elsevier, 2018, 117, pp.57 - 62. ⟨10.1016/j.radmeas.2018.07.011⟩. ⟨cea-01915979⟩



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