The diffusivity of the inert gas in crystals was studied by monitoring gas desorption kinetics during the annealing of previously saturated specimens. The results, for temperatures ranging from 100 to 350C, could be described by:

D (cm2/s) = 2.53 x 10-6 exp[-0.14(eV)/kT]

The results for temperatures ranging from 160 to 280C could be described by: D (cm2/s) = 1.3 x 10-6 exp[-0.10(eV)/kT]

The results for temperatures ranging from 300 to 400C could be described by:

D (cm2/s) = 1.66 x 10-2 exp[-0.36(eV)/kT]

and the results for temperatures ranging from 100 to 200C could be described by:

D (cm2/s) = 1.4 x 10-2 exp[-0.32(eV)/kT]

A.Y.Kupryazhkin, P.V.Volobuev, P.E.Suetin: Fizika Tverdogo Tela, 1974, 16[11], 3402-5