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Report No.
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Preliminary review on isotope separation of long life fission products; Application research of laser isotope separation to $$^{135}$$Cs

Oshita, Hironori ; Ozawa, Masaki; Ishikawa, Makoto; Koyama, Shinichi  ; Akatsuka, Hiroshi*

Recently establishment of self consistent nuclear fuel cycle has been required with respect to economical efficiency, safety and reduction of the load to the environment. Especially $$^{135}$$Cs included in spent fuel of nuclear power plants has extremely long half life (3.0$$times$$10$$^{6}$$y) and its water solubility leads to the anxiety of exudation into ground water in geologic disposal. Recent technology development of laser has come to make it possible in principle to excite a specific isotope and separate it making use of the intrinsic physical and chemical properties of the excited state. This document reports the review of the isotope separation principle and its application to $$^{135}$$Cs separation.

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