Temperature dependence of g values for H2O and D2O irradiated with low linear energy transfer radiation

Abstract

The g values for the primary species formed in the γ-radiolysis of light and heavy water have been measured as a function of temperature up to 300 °C. With the exception of g(H₂) and g(D₂), all the g values are consistent with the generally accepted diffusion-kinetic model of spurs, i.e. with an increase in temperature, the g values of the free radicals increased while those of peroxide decreased. The g values for H₂ and D₂ increased with temperature which suggests that they are formed by other mechanisms in addition to radical–radical reactions in the spur.