Open Access. Powered by Scholars. Published by Universities.®

Physics Commons

Open Access. Powered by Scholars. Published by Universities.®

University of Nebraska - Lincoln

2000

Gordon Gallup Publications

Articles 1 - 2 of 2

Full-Text Articles in Physics

Comparative Studies Of Dissociative Electron Attachment To Methyl Halides, R. S. Wilde, Gordon A. Gallup, Ilya I. Fabrikant Nov 2000

Comparative Studies Of Dissociative Electron Attachment To Methyl Halides, R. S. Wilde, Gordon A. Gallup, Ilya I. Fabrikant

Gordon Gallup Publications

The dissociative electron attachment cross sections for the methyl halides vary in an enormous range from the virtually unmeasurable 10−23 cm2 for CH3Cl at room temperature to 10−14 cm2 for CH3I. In this paper we supplement our previous studies by calculations of dissociative electron attachment to CH3Br and compare results for all methyl halides studied so far. The rate as a function of temperature for CH3Cl and CH3Br exhibits an exponential dependence on 1/T (Arrhenius law) with the activation energy lower for CH3Br ...


Dissociative Electron Attachment To Vibrationally And Rotationally Excited H2 And Hf Molecules, Yinfan Xu, Gordon A. Gallup, Ilya I. Fabrikant Apr 2000

Dissociative Electron Attachment To Vibrationally And Rotationally Excited H2 And Hf Molecules, Yinfan Xu, Gordon A. Gallup, Ilya I. Fabrikant

Gordon Gallup Publications

The vibrational and rotational state dependence of dissociative attachment (DA) in low-energy e-H2 and e-HF collisions is studied within the framework of nonlocal resonance theory. The dynamics of nuclear motion in the nonlocal complex potential is treated by the quasiclassical approach. The resonance energy, width function, and level-shift function are taken from our previous calculations based on the projection operator formalism. Results for all vibrational states up to the dissociative attachment thresholds and selected rotational states are presented. Our cross sections for H2 exhibit a plateau structure in the energy range above the dissociation threshold, and ...