The serial sectioning technique was used to study the self-diffusion of 137Cs in pure or Ba-doped crystals at temperatures ranging from 360 to 460C. It was found that the results could be described by:

D (cm2/s) = 1.10 exp[-1.35(eV)/kT]

Self-Diffusion in Single Crystals of CsCl. I.M.Hoodless, R.G.Turner: Journal of Physics and Chemistry of Solids, 1972, 33[10], 1915-9