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Series

1990

Wayne State University

Articles 1 - 2 of 2

Full-Text Articles in Physics

Nonlocal Effects In Dissociative Electron Attachment To H2, D E. Atems, J M. Wadehra Apr 1990

Nonlocal Effects In Dissociative Electron Attachment To H2, D E. Atems, J M. Wadehra

Physics and Astronomy Faculty Research Publications

Electron scattering by diatomic molecules involving the formation of a single resonance is treated within the configuration-interaction formalism. A technique is presented for solving the resulting nonlocal integro-differential equation for the nuclear motion in the resonant state. This technique is applied to the scattering of electrons by molecular hydrogen (and its isotopes) via the formation of X^2 Σ^+_u resonance, using a semiempirical model for the resonant state. Numerical cross sections for dissociative attachment, to H_2, of electrons with energies below 5 eV are presented and compared both with available experimental data and with those obtained using the local ...


Rovibrationally Enhanced Dissociative Electron Attachment To Molecular Lithium, J M. Wadehra Apr 1990

Rovibrationally Enhanced Dissociative Electron Attachment To Molecular Lithium, J M. Wadehra

Physics and Astronomy Faculty Research Publications

We have investigated the role played by initial rovibrational excitation of Li_2 on the cross sections and rates for dissociative electron attachment to the molecule. For a given internal energy, the vibrational excitation enhances the attachment cross section more than the rotational excitation. The attachment cross sections and the attachment rates reach their maximum values when the process of dissociative attachment to rovibrationally excited molecules is still endoergic and, furthermore, these quantities stay close to their maximum values even when the process changes from being endoergic to exoergic. The upper bounds on the cross sections and the rates for dissociative ...