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- W2201369688 endingPage "280" @default.
- W2201369688 startingPage "225" @default.
- W2201369688 abstract "There is now a well-recognized distinction between “classically allowed” and “classically forbidden” events in the theory of molecular scattering. The most important semiclassical correction to classical mechanics is to ascribe a phase to each trajectory dependent on the classical action, which is real for the allowed events and complex for those which are forbidden. This leads to interference effects in the allowed regime and to exponentially small transition probabilities in situations forbidden by classical mechanics. The treatment of the classical threshold region raise special problems that must be handled by means of the now well-developed class of uniform approximations, designed to pass smoothly from the oscillatory (classically allowed) to the exponentially damped (classically forbidden) region. The major exceptions to this general semiclassical behavior occur when either the effective mass or the available interaction is sufficiently small that the classical action involved is comparable with ħ. The results cited in this chapter confirm that such oscillations will generally be observable in scattering experiments involving atoms, by currently available experimental techniques. The situation with respect to inelastic and reactive collisions is less clear. Nonresonant vibrational energy transfer between most small molecules is classically forbidden at thermal energies, so that oscillatory interference effects are precluded, but the calculations reported in the chapter indicate that the classically forbidden version of the theory would be applicable." @default.
- W2201369688 created "2016-06-24" @default.
- W2201369688 creator A5011264315 @default.
- W2201369688 date "1979-01-01" @default.
- W2201369688 modified "2023-10-16" @default.
- W2201369688 title "Semiclassical Effects in Heavy-Particle Collisions" @default.
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