Osaka University Radiation Laboratory

To collect this volume of data, linear accelerators with nanosecond time resolution were, and still are now, routinely used around the world. Faster, picoseond linac machines were built first in Toronto and then at Argonne National Laboratory. Picosecond accelerators for pulse radiolysis have been in use for nearly three decades at Argonne, at the Osaka University Radiation Laboratory, and the University of Tokyo Nuclear Engineering Research... 

Acknowledgement We are deeply indebted to Mr. Tadao Takada and Mrs. Sachiko Tojo who have contributed to the experiment. We also thank the members of the Radiation Laboratory of SANKEN, Osaka University, for running the linear accelerator. This work has been partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sport and Culture of Japan. 

The authors wish to thank the Radiation Laboratory, the Institute of the Scientific and Industrial Research, Osaka University, for allowing them to use the Co facilities. 

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