Atomic Energy Society of Japan

The use of radiation-resistant resins becomes increasing as vessels for irradiation experiments. Polyimide (Kapton) was used on surfaces in contact with water in our radiolysis experiments, but the obtained results were not same to that when glass vials were used. In this study, to investigate the effect of resin on water radiolysis, the amounts of dichromate reduction and H₂O₂ formation after gamma-irradiation were compared in the presence or absence of resin in the aqueous solutions. The presence of resins increased the reduction but hardly changed the formation. Therefore, the reduction caused by radiolysis in aqueous solution was suggested to be promoted by the presence of resins. The promotion was further studied using pulse radiolysis, etc.