Investigation of bimolecular self-reaction between two hydrated electron in water

2015 Fiscal Year Final Research Report

• Project/Area Number: 25630433
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nuclear engineering
• Research Institution: Osaka University
• Principal Investigator: Muroya Yusa 大阪大学, 産業科学研究所, 准教授 (40334320)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 放射線化学反応 / 水和電子 / 再結合 / 二量体 / 水素発生

Outline of Final Research Achievements

Bimolecular self-reaction between two hydrated electron generated by ionizing radiation in water is regarded as one of predominant reaction to form molecular hydrogen. It was investigated by using highly time-resolved pulse radiolysis method and numerical simulation based on spur-diffusion model. The reactivity was evaluated at various conditions such as dose rate, temperature, and pH, which revealed that the reaction can occur smoothly at high temperature contrary to the previous belief. It was also found out that there exists an intermediate state in the stepwise reaction process, in which the reaction path can be affected by solutes such as hydroxide ion.

Free Research Field

放射線化学