Helium, deuterium, and neon migration in a common borosilicate glass

Helium, deuterium, and neon permeability, diffusivity, and solubility have been measured for CGW-7740 glass. The results indicate that gas migration occurs primarily through the silica-rich phase. Reaction of deuterium with the glass structure is evident at temperatures exceeding 300°C. The activation energy associated with this reaction is approximately 15 kcal/mole, which is the same as that for hydroxyl formation in vitreous silica.