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arXiv · 1408.2555

Ion-momentum imaging of dissociative electron attachment dynamics in acetylene

M. Fogle·D. J. Haxton·A. L. Landers·A. E. Orel·T. N. Rescigno
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Abstract

We present experimental results for dissociative electron attachment to acetylene near the 3 eV $^2Π_g$ resonance. In particular, we use an ion-momentum imaging technique to investigate the dissociation channel leading to C$_2$H$^-$ fragments. From our measured ion-momentum results we extract fragment kinetic energy and angular distributions. We directly observe a significant dissociation bending dynamic associated with the formation of the transitory negative ion. In modeling this bending dynamic with \emph{ab initio} electronic structure and fixed-nuclei scattering calculations we obtain good agreement with the experiment.

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M. Fogle, D. J. Haxton, A. L. Landers, A. E. Orel, T. N. Rescigno. 2014-08-11. Ion-momentum imaging of dissociative electron attachment dynamics in acetylene. https://doi.org/10.1103/physreva.90.042712

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