A study was made of isothermal gas release from single crystals which had been irradiated to a neutron dose (E ≥ 10keV) of 5.8 x 1015/cm2. The data for Xe diffusion in α-CsI could be described by:

D (cm2/s) = 0.3 exp[-0.98(eV)/kT]

Rare Gas Diffusion in Neutron Irradiated CsCl and CsI. F.W.Felix, K.Meier: Physica Status Solidi B, 1969, 32[2], K139-42

 

Table 199

Isotope Effect for Na in CsI

 

Temperature (C)

D (22Na)/D(24Na)-1

601.5

0.0034

599.3

0.0026

592.3

0.0026

551.3

0.0019

550.3

0.0014

550.5

0.0012

500.8

0.0018

450.1

0.0005