The operational properties of diesel fuel under static conditions were investigated before and after prolonged gamma irradiation in order to study post-irradiation polymerization processes. The experiments were carried out using neat diesel fuel and diesel fuel modified with a small amount of naphthalene to enhance its radiation resistance. Irradiation was performed at room temperature using a 60Co gamma source with the dose rate P = 0.6 Gy s–1 over the absorbed dose range D = 21–51 kGy. The density and viscosity of the diesel fuel were determined before and after irradiation. The flash point was measured using the Cleveland open cup method (CLA 5). The cetane number and other fuel properties were determined using a Zeltex ZX-440 XL analyzer. The chemical composition of the samples was analyzed by gas chromatography–mass spectrometry (GC–MS) using a Gerstel AGT GC/MS system. A kinetic study of post-irradiation polymerization reactions occurring after the cessation of irradiation has shown that both the rate of these processes and their contribution to the overall extent of polymerization are governed by the irradiation time, concentration of the initial components, and absorbed dose. The introduction of specialized additives (antirads) makes it possible to optimize the composition of diesel fuel, thereby enhancing its resistance to ionizing radiation. The objective of this study was to determine the optimal diesel fuel composition through modification with additives capable of improving its resistance to ionizing radiation.
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Jabbarova et al. (2026) studied this question.
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