Thermally stimulated luminescence (TSL) and electron spin resonance (ESR) spectra of X-, <$Egamma>- and <$Ebeta>-irradiated glasses with garnet (<$Eroman {Ca sub 3 Ga sub 2 Ge sub 3 O sub 12 }>), Ca-gallogermanate (<$Eroman {Ca sub 3 Ga sub 2 Ge sub 4 O sub 14 }>) and <$Eroman {Ca sub 3 Ga sub 2 O sub 6 }> compositions have been investigated and analysed. X- and <$Egamma>-irradiation of the Ge-containing glasses induces simultaneously electron and hole paramagnetic defects, stable at room temperature, whereas the same irradiation of glasses with <$Eroman {Ca sub 3 Ga sub 2 O sub 6 }> composition yields only in stable hole paramagnetic defects. The electron defects are assigned to ensembles of <$Eroman E prime> (Ge) centres with different local environments. The hole defects belong to ensembles of <$Eroman O sup -> centres, localised at different non-bridging oxygens of the glass network. The pronounced TSL glow curves in the <$Egamma>- and X-irradiated Ge-containing glasses peaked at about <$E280~ symbol Р roman C> are attributed to recombination of the <$Eroman E prime> (Ge) centres. The TSL glow curves with the maximum near <$E230~ symbol Р roman C> in the <$Egamma>- and X-irradiated Ge-containing glasses and the glass and ceramics with <$Eroman {Ca sub 3 Ga sub 2 O sub 6 }> composition are related to recombination of the <$Eroman O sup -> centres. The TSL glow curve peaked in the vicinity of <$E380~ symbol Р roman C> observed in the <$Egamma>- and X-irradiated glasses with <$Eroman {Ca sub 3 Ga sub 2 O sub 6 }> composition could be assigned to recombination of non-paramagnetic defects.

No TSL glow curves are observed in the <$Ebeta>-irradiated Ge-containing glasses, whereas the TSL glow curves with the maxima at about 120, 220 and <$E380~ symbol Р roman C> are peculiar for the glass and ceramics with <$Eroman {Ca sub 3 Ga sub 2 O sub 6 }> composition. The activation energy for the <$Ebeta>-induced defects isestimated and their models are discussed.

Індекс рубрикатора НБУВ: В372.4 + В374.99

Рубрики:

Аморфний (склоподібний) стан твердого тіла

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Шифр НБУВ: Ж42080 Пошук видання у каталогах НБУВ 

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• Падляк Богдан Володимирович (1956–) (фізико-математичні науки)

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