were first mixed and
then a certain volume of the above stock solution was added,
with the ω value fixed at 9.0. The mixtures were stirred at room
temperature until they became transparent. In the Brij 30-based
microemulsions, the cosurfactant was not used and the ω value
was fixed at 7.0 except as stated otherwise. After being bubbled
with high-purity N2 under anaerobic conditions, the microemulsions
were irradiated in a field of a 60Co γ -ray source
for 16 h and 40 min with an absorbed dosage of 40 kGy.