Electron Motions in Aqueous Systems—a Survey*

This paper reviews current experimental and theoretical information about the immediate fate of electrons generated in aqueous systems by ionizing radiation or photolysis of solutes. The applications of spur diffusion theory to pulse radiolysis and flash photolysis results are considered, with brief accounts of related developments in connection with time‐dependent rate constants, the radiation sensitivity of large biological targets, and long‐range electron interactions including tunneling.