ESR investigation of hydrogen atoms stabilized in γ-irradiated alkaline earth hydroxides

Radiolytic Events in Nanostructured Aluminum Hydroxides

“…Steinike et al reported the formation of ozonide in mechanical-treated Hydrargillite, a polymorph of the Gibbsite . Despite the poor quality of the figures reported in the literature, some similarities can be found between RID II signal and the signal reported by Steinike et al The authors assigned this center to ozonide radical O 3 – formed by reaction of O 2 with O – : …”

“…However, our samples have been extensively degassed, and thus we can wonder if radiolysis can produce dissolved oxygen in the material, as already observed in glasses. 28 The ozonide radical was observed as a singlet with g = 2.012 in barium hydroxides 8 and in different oxides such as quartz. 29 The presence of a third type of oxygen-centered defect must be taken into account: RID IV.…”

“…So far, limited data exists on the behavior of hydroxides under irradiation in general and of the prototypal AlOOH and Al­(OH) 3 in particular. − AlOOH (Boehmite) and Al­(OH) 3 (Bayerite) formed as corrosion products on fuel cladding, were selected to serve as model compounds for other hydroxides and oxyhydroxide encountered in the storage and disposal of nuclear wastes. Recently, hydrogen production under γ irradiation of similar materials was studied, suggesting that Al­(OH) 3 was not radiolysable despite its numerous hydroxyl groups.…”