Köln 2025 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Instrumentation II

HK 5.6: Vortrag

Montag, 10. März 2025, 16:15–16:30, SR Exp1B Chemie

Evaluation of different scintillating materials for neutron detection — •Valerii Dormenev, Kai-Thomas Brinkmann, Dzmitry Kazlou, and Hans-Georg Zaunick — 2nd Physics Institute, Justus Liebig University, Giessen, Germany

Non-destructive inspection, safety systems and scientific research use a wide range of physical methods and equipment for detection of different types of ionizing radiation. Among them, neutron counting in a wide energy range is one of most challenging tasks. The method of thermal and epithermal neutron measurements is often based on the interaction with several light isotopes such as ³He, ⁶Li, ¹⁰B or heavy isotopes like ¹⁵⁵Gd and ¹⁵⁷Gd with high neutron capture cross-section. Scintillation detectors combine nuclei with high neutron capture cross-section and scintillation centers in a single detection medium open an opportunity for the particle identification and separation utilizing pulse shape discrimination (PSD) method. Here we report test results obtained at HZDR (Helmholtz-Zentrum Dresden-Rossendorf, Germany) with 14.1MeV neutrons from deuterium-tritium generator. The response to monoenergetic neutrons and thermalized neutrons after 16 cm of standard polyethylene moderator were measured for different scintillators: Gd₃Al₂Ga₃O₁₂:Ce/Mg, (Gd_x-Y_(1−x))₃Al₂Ga₃O₁₂:Ce, Lu_2(1−x)Y_2xSiO₅:Ce, Lu_2(1−x)Gd_2xSiO₅:Ce as monocrystalline materials, (Gd,Lu,Y)₃Al₂Ga₃O₁₂:Ce/Mg in form of translucent ceramics, PEN as organic scintillator, two types of glass ceramics materials contained Gd and Li. The aim of the tests was evaluation of the PSD method separation of different particles for the different scintillators.

Keywords: Scintillator; neutron detection; detectors