A laboratory technique was developed for obtaining an ultra-low-background hybrid material based on organic glass — polymethyl methacrylate (PMMA). ¹⁵⁷Gd nuclei are used as an efficient absorber of thermal neutrons in the hybrid material. A uniform distribution of gadolinium in the PMMAmatrix is achieved by introducing the gadolinium in the form of a coordination compound — gadolinium acetylacetonate — into the hybrid material. A uniform gadolinium distribution was achieved in a 5 cm thick matrix of hybrid material with gadolinium mass content from 1.0 to 1.5%. It is shown that at 298 K the mechanical characteristics of the hybrid material samples coincide with nominally pure PMMA, but at 77 K the hybrid material is inferior to pure PMMA within admissible requirements.

开发了一种实验室技术，用于获得基于有机玻璃的超低背景混合材料——聚甲基丙烯酸甲酯 (PMMA)。¹⁵⁷ Gd 核被用作混合材料中热中子的有效吸收剂。钆在 PMMA 矩阵中的均匀分布是通过将钆以配位化合物 - 乙酰丙酮钆 - 的形式引入杂化材料中来实现的。在 5 厘米厚的混合材料矩阵中实现了均匀的钆分布，钆质量含量为 1.0% 到 1.5%。结果表明，在 298 K 时，混合材料样品的机械特性与名义上的纯 PMMA 一致，但在 77 K 时，混合材料在可接受的要求范围内不如纯 PMMA。