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- W2068488672 abstract "We derive a semiclassical S matrix for vibrationally inelastic collisions between two diatomic molecules, assuming a collinear geometry. Our theory incorporates a quantum mechanical superposition principle with classical dynamics and, as such, is an extension of the atom-diatomic molecule theory of Miller. The several approximations to the S matrix differ in the complexity with which the interference between various classical trajectories is treated. We report numerical calculations for H2–D2 and D2–D2 collisions based on two different interaction potentials. The cruder approximations yield transition probabilities which agree with exact quantum mechanical results to within a factor of 2. More sophisticated approximations to the S matrix yield excellent quantitative agreement with the quantum calculations. We also examine in detail the classical dynamics of the collision process and show that the molecules pass through a number of intermediate states during the encounter." @default.
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- W2068488672 date "1974-11-15" @default.
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- W2068488672 title "Semiclassical <i>S</i>-matrix theory of vibrationally inelastic collisions between two diatomic molecules" @default.
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- W2068488672 doi "https://doi.org/10.1063/1.1681690" @default.
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