Isotope Effect and Isotope Separation : A Chemist's View

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概要

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• What causes the isotope effects (IE)? This presentation will be centered around the equilibrium isotope effects due to the differences in the nuclear masses. The occurrence of the equilibrium constant, K, of isotope exchange reactions which differ from the values predicted by the classical theory of statistical mechanics, Kcl, is explored. The non-classical K corresponds to the unit-stage separation factor, α, that is different from unity and forms a basis of an isotope separation process involving the chemical exchange reaction. Here, the word “chemical exchange” includes not only the isotope exchange chemical reactions between two or more chemical species but also the isotope exchanges involving the equilibria between liquid and vapor phases and liquid-gas, liquid solution-gas, liquid-liquid, and solid-liquid phases. In Section I, origins of the isotope effect phenomena will be explored and, in the process, various quantities used in discussions of isotope effect that have often caused confusions will be unambiguously defined. This Section will also correlate equilibrium constant with separation factor. In Section II, various forms of temperature-dependence of IE and separation factor will be discussed.

• 一般社団法人 日本原子力学会の論文
• 2002-04-25

著者

• Ishida Takanobu

  Department Of Chemistry State University Of New York At Stony Brook

関連論文

• Early History of Chemical Exchange Isotope Enrichment and Lessons We Learn
• Isotope Effect and Isotope Separation : A Chemist's View

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