Purpose. To create large-size neutron-sensitive plastic scintillators with high long-term stability and with a sufficient quality indicator – n/γ-separation parameter FOM (Figure of merit).
Technical properties. The technology allows to obtain neutron-sensitive plastic scintillators with a diameter of up to 75×75 mm and n/γ-separation parameter FOM up to 2.12.
Scope. Organic matter technology, production of plastic scintillators.
Advantages. The technology allows to obtain neutron-sensitive plastic scintillators with increased long-term stability compared to analogues, while maintaining a high n/γ-separation parameter (FOM up to 2.12).
Technical and economic effect. The use of 2-phenyl-5-(4-tert-butylphenyl)-1,3,4-oxazole (TBPPO) as a primary additive in neutron-sensitive plastic scintillators allows to increase their long-term stability and thereby reduce the operating costs of detectors based on them. .
Description. A compound of the diaryloxazole class, 2-phenyl-5-(4-tert-butylphenyl)-1,3,4-oxazole, is synthesized and used as a primary luminescent additive in a polymer scintillation composition. Neutron-sensitive plastic scintillator blanks are obtained by free-radical thermally initiated polymerization of styrene in bulk.