An investigation was made of the release of 133Xe and 133mXe, from neutron-irradiated single crystals, as a function of temperature and neutron dose. The Xe release could be expressed in terms of volume diffusion. The results, for 200 to 550 and a neutron dose of 5.8 x 1016/cm2, could be described by:

D (cm2/s) = 2.0 exp[-1.14(eV)/kT]

Increasing the neutron dose resulted in a decrease in the diffusion coefficient.

Diffusion of Xenon in Cs-Halides Irradiated with Neutrons. F.W.Felix, K.Meier: Zeitschrift für Naturforschung, 1967, 22a[12], 2075-7

 

Table 200

Tracer Diffusion of 22Na in CsI

 

Sample

Temperature (C)

D (cm2/s)

polycrystalline

397.8

3.250 x 10-10

monocrystalline

397.8

3.205 x 10-10

polycrystalline

359.6

6.809 x 10-11

monocrystalline

359.6

6.611 x 10-11

 

Table 201

Diffusivity of 86Rb in CsI

 

Tracer

Temperature (K)

D (cm2/s)

42K

400.1

1.686 x 10-10

42K

420.3

3.946 x 10-10

42K

424.1

4.640 x 10-10

42K

447.0

1.061 x 10-9

42K

494.2

4.533 x 10-9

42K

531.3

1.129 x 10-8

42K

587.6

5.295 x 10-8

42K

590.7

5.405 x 10-8

42K

594.2

5.960 x 10-8

42K

611.2

9.950 x 10-8

42K

616.8

1.148 x 10-7

22Na

400.1

3.613 x 10-10

22Na

420.3

7.923 x 10-10

22Na

424.1

9.436 x 10-10

22Na

447.0

2.095 x 10-9

22Na

494.2

8.777 x 10-9

22Na

531.3

2.140 x 10-8

22Na

594.2

1.163 x 10-7

22Na

611.2

1.928 x 10-7

22Na

616.8

2.266 x 10-7