The Yield of Hydrogen Atoms in the Vapor Phase Radiolysis of Ammonia

Abstract

Abstract γ-Radiolysis of NH3+C3H8 mixtures was investigated at 22±1°C and total pressure ∼50cmHg. From the observed yield of hydrogen, H atom yield of ammonia radiolysis of GH=5.1–5.8 was obtained after subtraction of contribution from the propane fraction. The value is significantly lower than that determined from the study of NH3+D2 and NH3+N2H4 systems, and also that from the study of NH3+C3H8 system reported previously. A variety of possibilities is discussed with respect to the cause of the disagreement. The effect of addition of N2O or SF6, which acts as an electron scavenger, was also studied. The yield of hydrogen from NH3+C3H8 mixtures decreased appreciably, and ΔG(H2) in the absence and presence of electron scavengers was related to the change in the neutralization process.