Renner-Teller Effect on Dissociative Electron Attachments to Carbon Dioxide

TL;DR

This study investigates how the Renner-Teller effect influences dissociative electron attachment to CO₂, revealing its role in shaping the anisotropic momentum distributions of O⁻ ions through combined experimental and theoretical approaches.

Contribution

It provides new insights into the stereo-dynamics of electron attachment to CO₂, highlighting the impact of the Renner-Teller effect on dissociation processes.

Findings

Confirmation of the ^2{ extPi}_g Feshbach resonance at 8.0 eV

Identification of the Renner-Teller effect's influence on O⁻ momentum anisotropy

Demonstration of the dynamic evolution of dissociation pathways

Abstract

Stereo-dynamics of dissociative electron attachments to CO_2 is investigated by the O^- anion velocity imaging experiments combined with the R-matrix calculations. ^2{\Pi}_g as a Feshbach resonant state of CO_2^- is confirmed to play roles in the dissociations around 8.0 eV. We find that the dynamic evolutions of the Renner-Teller effect lead to the dramatically different anisotropic O^- momentum distributions.