Abstract
Ionizing radiation-induced defects in heavy metal fluoride glass have been studied by electron paramagnetic resonance (EPR) and electron spin echo (ESE) modulation techniques. Both pristine as well as water-contaminated glass samples were investigated. EPR measurements indicate that the radiation-induced defect observed after annealing at 393 K is not an oxide-related center introduced by water corrosion. ESE modulation data was used to probe the structure of the hole trap responsible for the so-called “central line”. From the observed aluminum modulation it is concluded that the defect site is located near an aluminum cation in the glass structure.
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