Abstract
Abstract The effect of additives and density on the radiolysis of ammonia at 140°C was studied over the density range 0.07 to 0.13 g/cc. The observation of a sharp decrease of G values in the radiolysis of pure ammonia at d∼0.1 g/cc confirmed the result reported by Toi et al. (Radiation Res., 17, 399 (1962)). The yield of hydrogen in the presence of ∼1.5 mol% C3H6 was practically independent of density at G=0.65 over the density range studied. G(H2) in the presence of C3H8, estimated by extrapolation to zero propane concentration, was also constant at G\simeq5.7 at d\simeq0.07 and 0.13 g/cc. These observations were discussed in relation to the mechanism for depression of G values in the radiolysis of pure ammonia at higher densities.
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