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Diffusion and trapping of argon in irradiated ionic crystals

Authors
Journal
Journal of Physics and Chemistry of Solids
0022-3697
Publisher
Elsevier
Publication Date
Volume
28
Issue
7
Identifiers
DOI: 10.1016/0022-3697(67)90062-5

Abstract

Abstract The diffusion of 41Ar and 39Ar in single crystals of potassium chloride and potassiumdoped sodium salts was measured after neutron irradiation. There seems to be a relationship between the activation energy and the energy barrier for interstitial diffusion. Low diffusion coefficients were measured not only as a result of increased neutron dose but also after doping with SrCl 2. It is assumed that trapping of rare-gas occurs and that vacancy clusters act as trapping centres. The damaged lattice partly recovers during an anneal but numerous clusters remain after prolonged heat treatment at 650°.

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