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- W2076154921 abstract "It is shown that the canonical perturbation procedure we recently developed for floppy molecules [M. Joyeux and D. Sugny, Can. J. Phys. 80, 1459 (2002)] gives precise results when several pseudopotential energy surfaces cross, while in this case a Born–Oppenheimer-type separation of motions totally fails. As an example, it is demonstrated that the vibrational degrees of freedom of C3 remain decoupled up to high energies, although a previous study based on a Born–Oppenheimer scheme erroneously concluded there were “heavy interactions” between some pairs of surfaces." @default.
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- W2076154921 date "2003-10-10" @default.
- W2076154921 modified "2023-09-25" @default.
- W2076154921 title "Canonical perturbation theory versus Born–Oppenheimer-type separation of motions: The vibrational dynamics of C3" @default.
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- W2076154921 doi "https://doi.org/10.1063/1.1613253" @default.
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