The highest time resolution of the pulse radiolysis had remained about 30 p
s since the late 1960s. To make clear the primary processes in the radiatio
n chemistry and physics within 30 ps, we developed a stroboscopic pulse rad
iolysis system for the absorption spectroscopy with the time resolution of
2.0 ps (10-90 % rise time). The time resolution of 2.0 ps was estimated fro
m the time-dependent behavior of the hydrated electrons. The system consist
s of a subpicosecond electron linac as an irradiation source, a femtosecond
laser as an analyzing light and a jitter compensation system. (C) 2000 Els
evier Science B.V. All rights reserved.