A laboratory technique has been developed for obtaining an ultra-low-background hybrid material based on organic glass - polymethyl methacrylate (PMMA). 157 Gd nuclei are used as an effective absorber of thermal neutrons in the hybrid material. The uniform distribution of gadolinium in the PMMA matrix is ??achieved by its introduction into the hybrid material in the form of a coordination compound - gadolinium acetylacetonate. A uniform distribution of gadolinium was achieved in a 5 cm thick matrix of hybrid material with a mass content of gadolinium from 1.0 to 1.5 & # 37 ;. It is shown that at a temperature of 298 K, the mechanical characteristics of the samples of the hybrid material and nominally pure PMMA coincide, and at a temperature of 77 K, the hybrid material is inferior to pure PMMA within the acceptable requirements.
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2 FGAOU VO & # 171; Belogorod State National Research University (Bel-GU) & # 187 ;, (Belgorod, Russia)
3 LLC & # 171; Marathon & # 187; (Moscow, Russia)
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