Study of supercontinuum generation for pulse radiolysis system

The initial processes in radiation chemistry have very short time scale (∼ 100 attosecond), and the initial processes are the dominant factor for the subsequent reaction. Therefore, it is very important to elucidate the initial process of the radiation chemical reaction. One of the methods to elucidate the initial process is pulse radiolysis. In pulse radiolysis, a substance is irradiated with ionizing radiation and at the same time irradiated with analytical light, and the absorption spectrum of the light is observed, which allows us to track the short-lived intermediate species. There are several requirements required for analytical light. We considered that the supercontinuum light generated by the second harmonic of the Er fiber laser would be the best analytical light to meet the requirements. In this presentation, we describe the current status of the development of this supercontinuum light and the prospects. (author)