By T. N. Rescigno, C. W. McCurdy, A. E. Orel, B. H. Lengsfield III (auth.), Winifred M. Huo, Franco A. Gianturco (eds.)
The collision of electrons with molecules and molecular ions is a primary seasoned cess in atomic and molecular physics and in chemistry. At excessive incident electron en ergies, electron-molecule collisions are used to infer molecular geometries, oscillator strengths for optically allowed transitions, and relating to electron-impact ionization, to probe the momentum distribution of the molecule itself. while the incident electron strength is analogous to or less than these of the molecular valence electrons, the physics concerned is very wealthy. Correlation and trade results essential to describe such collision procedures undergo an in depth resemblance to related efft:cts within the idea of digital constitution in molecules. Compound kingdom formations, within the type of resonances and vir tual states, happen themselves in experimental observables which supply info of the electron-molecule interactions. Ro-vibrational excitations by means of low-energy electron collisions exemplify power move among the digital and nuclear movement. The position of nonadiabatic interplay is raised right here. while the ultimate vibrational country is within the continuum, molecular dissociation happens. Dissociative recombination and dissociative attachment are examples of such fragmentation methods. as well as its basic nature, the research of electron-molecule collisions can also be stimulated through its relation to different fields of analysis and through its technological appli cations. The learn of planetary atmospheres and the interstellar medium inevitably contain collision techniques of electrons with molecules and molecular ions.
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