Radiation-induced damage and recovery effects in GG17 glass irradiated by 1 MeV electrons

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• 作者：Qingyan Wang^a ; ^{wqyhit03s@126.com} ; Zhonghua Zhang^b ; Hongbin Geng^c ; Chengyue Sun^c ; Dezhuang Yang^c ; Shiyu He^c ; Zhaochu Hu^d
• 关键词：GG17 glass ; Lamp envelope ; Radiation effects ; Room temperature annealing
• 刊名：Nuclear Instruments and Methods in Physics Research Section B ; Beam Interactions with Materials and Atoms
• 出版年：2012
• 期刊代码：42_0168583x
• 类别：ph
• 出版时间：15 June, 2012
• 卷：281
• 期：Complete
• 页码：1-7
• 文件大小：1073 K

摘要

The optical properties and microstructural damage of GG17 glasses, as well as their recovery during annealing at room temperature, are investigated after exposure to 1 MeV electrons with various fluences. Experimental results show that the electrons lead to severe optical degradation in the GG17 glass, and induce the formation of paramagnetic defects which can be mainly attributed to the boron-oxygen hole centers. With increasing annealing time at room temperature their decay serves as long-lived defects following first order kinetics. Except for the strong absorption bands located at 334-352 nm and 480 nm that corresponds to the boron-oxygen hole centers, weaker absorption bands appear at 780 nm or 794.6 nm after irradiation, inducing a decrease in transmittance by approximately 17%for a fluence of 1 脳 10¹⁶ cm^鈭?. It is shown that electron irradiation could cause a harmful effect on rubidium lamps when GG17 glass is used as the lamp envelope material.