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Neutron irradiation effects on optical and structural properties of silicate glasses

机译：中子辐照对硅酸盐玻璃光学和结构性能的影响

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摘要

The affect of thermal neutron irradiation on the optical and structural properties of the quaternary silicate glasses of varying compositions has been studied. Experimental results reveal the formation of colour centers in the visible region of the optical spectra. The optical energy gap and the width of the energy tail above the mobility gap have been measured before and after irradiation. The optical energy gap has been found to decrease with increase in neutron fluence. The decrease in the energy gap with the decrease in silica content of the glass is also observed. The change in glass network structure as revealed by the formation of non-bridging silicon-oxygen (Si-O-NBO) groups has been observed and explained in terms of radiation induced structural defects and composition of the glass.
机译：研究了热中子辐照对不同组成的季硅酸盐玻璃的光学和结构性质的影响。实验结果揭示了在光谱的可见光区域中色心的形成。在辐照之前和之后，已经测量了光能隙和迁移率间隙上方的能量尾部的宽度。已经发现光能隙随着中子注量的增加而减小。还观察到随着玻璃的二氧化硅含量的减少，能隙的减少。已经观察到并通过辐射引起的结构缺陷和玻璃成分来观察和解释玻璃网络结构的变化，该变化通过形成非桥连的硅-氧（Si-O-NBO）基团而揭示。

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