A study was made of the diffusion and trapping of Xe, in ion-bombarded single crystals. This release could be described by:

D (cm2/s) = 1.0 x 101 exp[-1.4(eV)/kT]

H.J.Matzke: Zeitschrift für Naturforschung, 1967, 22a[4], 507-18

The best linear fits to the solute diffusion data ([336] to [347]) yield:

Ar: Ln[Do] = 0.77E – 13 (R2 = 0.98); Br: Ln[Do] = 0.49E – 18.3 (R2 = 0.88);

He: Ln[Do] = 1.17E – 15.9 (R2 = 0.58)