Diffusion kinetic calculations are used to confirm that a simple Lapla
ce transform can be used to relate the radiation chemistry of aqueous
solutions to the time-dependent yields of the radiation induced specie
s in water in the absence of scavengers. Simple equations for the scav
enger concentration dependence of the scavengable yield of e(aq)- and
OH and for the yield of H-2 and H2O2 in scavenger solutions are presen
ted. The time-dependent decay/formation kinetics of e(aq)-, OH, H-2 an
d H2O2 are obtained from the inverse Laplace transforms of these equat
ions.