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XPS and Raman studies of electron irradiated sodium silicate glass
Authors:Chen Liang  Wang Tie-Shan  Zhang Gen-Fa  Yang Kun-Jie  Peng Hai-Bo  Zhang Li-Min
Abstract:The microstructure modifications of sodium silicate glass induced by 1.2-MeV electron irradiation are studied by x-ray photoelectron spectroscopy and Raman spectroscopy. Depth profile analyses are also performed on the irradiated glass at 109Gy. A sodium-depleted layer with a thickness of a few tens of nanometers and the corresponding increase of network polymerization on the top surface are observed after electron bombardment, while the polymerization in the subsurface region has a negligible variation with the irradiation dose. Moreover, the formation of molecular oxygen after electron irradiation is evidenced, which is mainly aggregated in the first two-micron-thick irradiated glass surface. These modifications are correlated to the network relaxation process as a consequence of the diffusion and desorption of sodium species during electron irradiation.
Keywords:silicate glass  electron irradiation  network polymerization  oxygen molecule
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