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CO2 laser isotope separation of tritium with (CF3)3CT

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Abstract

A new working molecule 1,1,1,3,3,3-hexafluoro-2-(trifluoromethyl)-propane-2-t (CF3)3CT, is reported for the isotope separation of tritium by TEA CO2-laser-induced multiphoton dissociation (MPD). Selective and efficient dissociation of (CF3)3CT was observed by irradiation at about 980 cm−1 where (CF3)3CH was nearly transparent. The critical fluence for dissociation of (CF3)3CT at 10R(28) 980.9 cm−1 was estimated to be as low as 4.6 J/cm2, which is the lowest of the tritiated halocarbons that we have ever reported. A detailed study was made of the pressure dependence of the dissociation rate constants for (CF3)3CT and (CF3)3CH to clarify the collisional effects in their MPD. The hydrogen isotope exchange between (CF3)3CH and HTO was found to be extremely rapid, which is advantageous in the practical laser separation cycle for tritium removal from water.

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Authors and Affiliations

  1. The Institute of Physical and Chemical Research, 351-01, Wako, Saitama, Japan

    S. Kato, S. Satooka & K. Takeuchi

  2. Department of Chemistry, Faculty of Science, The University of Tokyo, Hongo, 113, Tokyo, Japan

    Y. Makide & T. Tominaga

Authors
  1. S. Kato
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  2. S. Satooka
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  3. K. Takeuchi
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  4. Y. Makide
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  5. T. Tominaga
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Kato, S., Satooka, S., Takeuchi, K. et al. CO2 laser isotope separation of tritium with (CF3)3CT. Appl. Phys. B 42, 167–172 (1987). https://doi.org/10.1007/BF00693880

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  • DOI: https://doi.org/10.1007/BF00693880

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