Chlorine diffusion in uranium dioxide under heavy ion irradiation - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Conference Papers Year : 2007

Chlorine diffusion in uranium dioxide under heavy ion irradiation

Abstract

The radiation enhanced diffusion of chlorine in UO2 during heavy ion irradiation is studied. In order to simulate the behaviour of 36Cl, present as an impurity in UO2, 37Cl has been implanted into the samples (projected range 200 nm). The samples were then irradiated with 63.5 MeV 127I at two fluxes and two temperatures and the chlorine distribution was analyzed by SIMS. The results show that, during irradiation, the diffusion of the implanted chlorine is enhanced and slightly athermal with respect to pure thermal diffusion. A chlorine gain of 10% accumulating near the surface has been observed at 510 K. This corresponds to the displacement of pristine chlorine from a region of maximum defect concentration. This behaviour and the mean value of the apparent diffusion coefficient found for the implanted chlorine, around 2.5 × 10−14 cm2 s−1, reflect the high mobility of chlorine in UO2 during irradiation with fission products.

Dates and versions

in2p3-00170334 , version 1 (07-09-2007)

Identifiers

Cite

Y. Pipon, N. Bérerd, N. Moncoffre, C. Peaucelle, N. Toulhoat, et al.. Chlorine diffusion in uranium dioxide under heavy ion irradiation. 15th International Conference on Ion Beam Modification of Materials, Sep 2006, Taormina, Italy. pp.527-531, ⟨10.1016/j.nimb.2007.01.105⟩. ⟨in2p3-00170334⟩
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