DIFFUSION COEFFICIENT AND SOLUBILITY MEASUREMENTS OF NOBLE GASES IN ICE CRYSTALS

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Diffusion coefficients and solubility of helium, neon and argon gases in ice crystals were determined by measuring the pressure rise in a vessel caused by gas emission from an ice sample supersaturated with the gas. Diffusion coefficients of helium, neon and argon gases in the temperature range between 258.2 K and 268.2 K were on the order of (10)^<-9>m^2s^<-1>, (10)^<-10>m^2s^<-1> and (10)^<-11>m^2s^<-1>, respectively. Solubilities of helium and neon gases in the molar fraction deduced from the total amount of emitted gases were on the order of (10)^<-6> and (10)^<-7>, respectively. As the diffusion coefficients of noble gases were found to depend on their molecular radii, the diffusion coefficients of air molecules, such as nitrogen and oxygen, in ice were estimated.
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