FIELD: scintillation equipment, in particular, radiation-stable plastic scintillators. SUBSTANCE: goal of invention is achieved by microporous device design with three- dimensional porosity within range of 0,025<ϕ<0,5. Average diameter of pores and channels is d, which conforms to condition 10-3< d/λ < (λ/Lϕ)1/3, where L is height of scintillator, λ - is wavelength of light output by scintillation doping. EFFECT: possibility to keep at least 90% of light output with respect to initial value after absorbing heavy dose of ionizing radiation. 1 dwg, 1 tbl, 9 ex
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