Abstract
The pressure dependence of helium (at 25 °C) and neon (at 150 °C) solubility in vitreous silica has been measured at pressures up to 1400 atm. Results appear to be readily explained by a simple statistical thermodynamical model based on the Langmuir adsorption model. Values for the accessible free volume of the glass network equal to 2.3×1021 atoms/cm3 for helium and 1.3×1021 atoms/cm3 for neon were obtained from these results.