ESR study of the formation of complex defects involving molecular oxygen by electron-hole reactions in x-irradiated KClO3 and KBrO3

X irradiation of solid KXO3, X=Cl, Br, is shown to produce complex defects of composition [XO−, O2] and [XO, O2]. [XO−, O2], which is produced also by UV irradiation of KXO3, is formed during and after x irradiation in a reaction between electrons, self-trapped as XO2−3, and holes, self-trapped as XO3. [XO,O2] is shown to arise in the oxidation of [XO−,O2] by reaction with XO3. In KClO3, the complex [ClO2,O2] is formed also, possibly in a reaction between ClO3 and [ClO−2,O2] .