Picosecond synchrotron radiation pulse radiolysis

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This article discusses pulse radiolysis using synchrotron radiation from the TRISTAN accelerators, the accumulation ring (AR) and the main ring (MR). They provide intense radiation, the energy of which goes up to the γ-ray region, and a pulse length below 50 ps, which could be below 10 ps. The time separation between neighboring bunches is 1.25 μs at the AR and 5 μs at the MR. These features should make it possible to detect reactive intermediates in radiation-induced reactions in the time span from picoseconds to microseconds. Possible applications of the picosecond synchrotron radiation pulse radiolysis are introduced. They include studies of radiation effect on resist materials, on radiation sensitive materials, biological systems, and reaction from selected states such as Rydberg state, inner-shell excited states, and multi-ionized states.