TEMPERATURE-DEPENDENCE OF G-VALUES FOR H2O AND D2O IRRADIATED WITH LOW LINEAR ENERGY-TRANSFER RADIATION

The g values for the primary species formed in the gamma-radiolysis of light and heavy water have been measured as a function of temperature up to 300-degrees-C. With the exception of g(H-2) 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 H-2 and D2 increased with temperature which suggests that they are formed by other mechanisms in addition to radical-radical reactions in the spur.