Computational Methods for Electron-Molecule Collisions - Proceedings of the Workshop in Comparative Study of Current Methodologies in Electron-Molecule Scattering Held March 11-13, 1993, in Cambridge, Massachusetts

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ISBN 10: 0306449110 / ISBN 13: 9780306449116

Published by Springer, 1995

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Bibliographic Details

• Title: Computational Methods for Electron-Molecule Collisions - Proceedings of the Workshop in Comparative Study of Current Methodologies in Electron-Molecule Scattering Held March 11-13, 1993, in Cambridge, Massachusetts
• Publisher: Springer
• Publication Date: 1995
• Language: English
• ISBN 10: 0306449110
• ISBN 13: 9780306449116
• Binding: Hardcover
• Condition: Brand New

About this title

Synopsis

The collision of electrons with molecules and molecular ions is a fundamental pro­ cess in atomic and molecular physics and in chemistry. At high incident electron en­ ergies, electron-molecule collisions are used to deduce molecular geometries, oscillator strengths for optically allowed transitions, and in the case of electron-impact ionization, to probe the momentum distribution of the molecule itself. When the incident electron energy is comparable to or below those of the molecular valence electrons, the physics involved is particularly rich. Correlation and exchange effects necessary to describe such collision processes bear a close resemblance to similar efft:cts in the theory of electronic structure in molecules. Compound state formations, in the form of resonances and vir­ tual states, manifest themselves in experimental observables which provide details of the electron-molecule interactions. Ro-vibrational excitations by low-energy electron collisions exemplify energy transfer between the electronic and nuclear motion. The role of nonadiabatic interaction is raised here. When the final vibrational state is in the continuum, molecular dissociation occurs. Dissociative recombination and dissociative attachment are examples of such fragmentation processes. In addition to its fundamental nature, the study of electron-molecule collisions is also motivated by its relation to other fields of study and by its technological appli­ cations. The study of planetary atmospheres and the interstellar medium necessarily involve collision processes of electrons with molecules and molecular ions.

Synopsis

Proceedings of the March 1993 workshop on Comparative Study of Current Methodologies in Electron-Molecule Scattering. Sections organized by method, such as the complex Kohn variational method and the Schwinger variational method, cover the time-independent ab inito methods for low-energy electron-molecule collisions, and demonstrate how these metho