抄録
The γ-radiolysis of water has been studied using a water-loop specially designed for this purpose. The water was circulated without contact with air during the irradiation. The apparent G(H2) value was found to be roughly 10-3. However a corresponding amount of O2, was not found, due to its consumption by corroding reactions of the constituent materials under radiation field. In the presence of O2, and H2O2, the H2-yield curves vs. the irradiation dose were revealed a very distinctive characteristic: following a rapid increase with initial irradiation a plateau range has appeared. The H2-yield at this plateau range depended on the initial concentration of additives. Continued irradiation, however, caused a gradual further rise in the H2-yield above the plateau value at a rate corresponding to that found in the pure water system. These yield curves are discussed on the basis of the free radical model for the radiolysis of water.
