Journal ArticleDOI
On the Mechanism of Unimolecular Electron Capture
Felix Bloch,Norris E. Bradbury +1 more
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TLDR
In this article, the formation of negative ions by electron capture in gases in which a dissociation process does not occur is explained by a unimolecular process involving the excitation of molecular vibrational levels and subsequent loss of energy by collision or resonance.Abstract:
The formation of negative ions by electron capture in gases in which a dissociation process does not occur is explained by a unimolecular process involving the excitation of molecular vibrational levels and subsequent loss of energy by collision or resonance. In order to obtain a proper order of magnitude to agree with experimental observations, one must assume a change of only one vibrational quantum number. This sets an upper limit on the electron affinity. For the case of ${\mathrm{O}}_{2}$, this limit is 0.17 volt consistent with other observations. The theory also yields a dependence of the phenomenon on the average energy of the electrons which is in agreement with experiment.read more
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Journal ArticleDOI
The theory of electron-molecule collisions
TL;DR: The current state of the theory and its application to low-energy electron-molecule collisions is reviewed in this paper, where the emphasis is on elastic scattering and vibrational and rotational excitation of small diatomic and polyatomic molecules.
Journal ArticleDOI
Molecular Photodetachment Spectrometry. II. The Electron Affinity of O2 and the Structure of O2
TL;DR: In this paper, the electron energy spectra were obtained from a hemispherical analyzer and the relative transition probabilities as a function of final vibrational state and the angular distributions of the outgoing electrons were measured.
Book ChapterDOI
Resonance and Threshold Phenomena in Low-Energy Electron Collisions with Molecules and Clusters
TL;DR: In this paper, the authors discuss resonance and threshold phenomena in low-energy electron collisions with molecules and clusters, and the theoretical description of electron-molecule collisions generally requires an adequate description of electronic, vibrational and rotational degrees of freedom.
Journal ArticleDOI
Measurements of the Attachment of Low-Energy Electrons to Oxygen Molecules
Journal ArticleDOI
Simultaneous Measurement of Ionization and Attachment Coefficients.
TL;DR: In this article, measurements have been made of pre-breakdown currents in four gases: oxygen, air, freon-12 (C${\mathrm{Cl}}_{2}$${{F}}{2}$), and C${\rm{F}_{3}$S${F''s5}$