Exchange of tritium implanted into oxide ceramics for protium by exposure to air vapors at room temperature

The exchange of tritium, implanted into an oxide ceramic with a pure tritium ion beam, for protium by exposure to normal air at room temperature has been measured in a collaboration experiment with the Tritium Laboratory group, JAERI. It is shown that the release of THO produced by the exchange H 2O...

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Bibliographic Details
Published in:Journal of nuclear materials 2002-12, Vol.307, p.1461-1465
Main Authors: Morita, Kenji, Suzuki, Hironori, Soda, Kazuo, Iwahara, H., Nakamura, Hirofumi, Hayasi, Takumi, Nishi, Masataka
Format: Article
Language:English
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Summary:The exchange of tritium, implanted into an oxide ceramic with a pure tritium ion beam, for protium by exposure to normal air at room temperature has been measured in a collaboration experiment with the Tritium Laboratory group, JAERI. It is shown that the release of THO produced by the exchange H 2O+T→THO+H at the surface of the crystallites decreases monotonically with exposure time, while the release of TH gas increases in the beginning, reaches a maximum and decreases monotonically as the time increases. The latter behavior of TH gas release gives an important evidence for bulk recombination of H uptaken from the surface with T implanted. These results are discussed based on the one-way diffusion model proposed previously for the explanation of the D–H exchange experiment.
ISSN:0022-3115
1873-4820
DOI:10.1016/S0022-3115(02)01286-2