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Influences of Thermal Annealing Temperatures on Irradiation Induced E^{\prime } Centers in Silica Glass

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3 Author(s)
Tingyun Wang ; Sch. of Commun. & Inf. Eng., Shanghai Univ., Shanghai ; Zhongyin Xiao ; Wenyun Luo

Influences of pre-irradiation and thermal annealing on E ' defect concentration are studied by measuring E ' centers and optical absorptions using ESR and spectrophotometer, respectively. The results show that the E ' defect concentration decreases significantly when silica glass is pre-irradiated by gamma rays and a subsequent thermal annealing. The effect of thermal annealing on the E ' concentration has also been investigated for the temperature from 300degC to 1300degC. It is found from the ESR spectrum that the anti-irradiated property of the silica glass can be improved when the thermal annealing temperature is larger than 700degC. These results have been proved by optical absorption spectra.

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Nuclear Science, IEEE Transactions on  (Volume:55 ,  Issue: 5 )