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By K. P. Lawley

ISBN-10: 0470143827

ISBN-13: 9780470143827

ISBN-10: 0471519006

ISBN-13: 9780471519003

The Advances in Chemical Physics sequence offers the chemical physics and actual chemistry fields with a discussion board for serious, authoritative reviews of advances in each zone of the self-discipline. full of state-of-the-art learn suggested in a cohesive demeanour now not discovered in other places within the literature, each one quantity of the Advances in Chemical Physics sequence serves because the excellent complement to any complex graduate type dedicated to the examine of chemical physics.

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Additional resources for Advances in Chemical Physics: Molecular Scattering: Physical and Chemical Applications, Volume 30

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The result above shows that they are not sufficient, either. The phase-space model has been applied to triple collisions by F. T. Smith (1969) in a detailed study of termolecular reaction rates. He classified 3-body entry or exit channels into two classes, of pure and indirect triple collisions, and introduced kinematic variables appropriate to each class. These variables were then used to develop a statistical theory of break-up cross-sections. A recent contribution (Rebick and Levine, 1973) has dealt with collision induced dissociation (CID) along similar lines.

The remaining terms in the Hamiltonian are considered a perturbation and a Born expansion is proposed for the scattering amplitudes. A more recent paper by the same author (1973) evaluates coupling terms of the Hamiltonian between adiabatic vibrational states in a semiclassical fashion, which leads to equations similar to the Landau-Zener one for electronic excitation. The author indicates the presence of a spurious asymptotic coupling in this other work. Parameters required in the model of Hofacker have been approximated (Hofacker and Rosch, 1973) for the F + H2 surface recently calculated by Schaefer et al.

These and other results contain some warnings about semi-empirical procedures to extract opacities. e. both inelastic and reactive ones, the p ( k , b) may be identified with probabilities of reactions only for those impact parameters at which reaction QUANTUM THEORY OF REACTIVE MOLECULAR COLLISIONS 51 predominates. e. only at large b for most potentials. A generalized opacity function Pl may simply be defined by rearranging the expression for (Tba in terms of the S matrix, to obtain = (n/si) c(21a + a) 1, Averaging this over a distribution of energies, one is led to a formal expression for (PJAV which may be parametrized on physical grounds, to describe reaction processes.

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Advances in Chemical Physics: Molecular Scattering: Physical and Chemical Applications, Volume 30 by K. P. Lawley


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