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Tracer diffusion of 22Na has been measured between room temperature and 350 C, with and without simultaneous irradiation by alpha-particles at two dose rates, corresponding to the lowest rate experienced by real glasses and to a rate surpassing the highest rate of real storage conditions. Both rates correspond to those of a "pulsed irradiation", since overlapping of the damaged volumes occurs too seldom to set up the postulated relaxed structure allowing fast percolation of Na, following an incubation period during irradiation with external beams of electrons, protons or heavy ions. The conclusion from the experiments presented is therefore that radiation-enhancement of Na-diffusion under realistic alpha-decay rates is very small, even at 175 C.

Additional information

Authors: YAMASHITA M, Government Industrial Research Institute, Osaka (JP);MATZKE H-J, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: E-MRS Symposium on Chemical and Physical Modifications Induced by Irradiation in Glasses, Strasbourg (FR), Nov. 4-8, 1991
Availability: Available from (1) as Paper EN 36568 ORA
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