Abstract

The radical yields Gr in gas oil, hydroterphenyl, and monoisopropyldiphenyl were measured after their irradiation by electrons at −170°C, as were the yields of high-boiling products Gh.b after irradiation of these same substances in a reactor at a temperature of 50°C. From a comparison of these quantities it follows that larger values of Gr correspond to larger values of Gh. b. It was shown that the calculated radiation yields of radicals in the liquid phase differ from the values measured in the solid phase by no more than four-fold. On this basis it is concluded that the radiation stability of organic coolants in the liquid phase can be predicted according to the radiation yield of radicals in the solid phase.

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