Ion-momentum imaging of dissociative attachment of electrons to molecules

We present an overview of experiments and theory relevant to dissociative electron attachment studied by momentum imaging. We describe several key examples of characteristic transient anion dynamics in the form of small polyatomic electron-molecule systems. In each of these examples the so-called ax...

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Bibliographic Details
Published in:Journal of physics. B, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2016-10, Vol.49 (22), p.222001
Main Authors: Slaughter, D S, Belkacem, A, McCurdy, C W, Rescigno, T N, Haxton, D J
Format: Article
Language:English
Subjects:
anions
ATOMIC AND MOLECULAR PHYSICS
Born-Oppenheimer
dissociation
dissociative electron attachment
electron scattering
momentum imaging
non-Born-Oppenheimer
RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
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Summary:We present an overview of experiments and theory relevant to dissociative electron attachment studied by momentum imaging. We describe several key examples of characteristic transient anion dynamics in the form of small polyatomic electron-molecule systems. In each of these examples the so-called axial recoil approximation is found to break down due to correlation of the electronic and nuclear degrees of freedom of the transient anion. Guided by anion fragment momentum measurements and predictions of the electron scattering attachment probability in the molecular frame, we demonstrate that accurate predictions of the dissociation dynamics can be achieved without a detailed investigation of the surface topology of the relevant electronic states or the fragment trajectories on those surfaces.
ISSN:0953-4075
1361-6455
DOI:10.1088/0953-4075/49/22/222001