Dissociative electron attachment to carbon dioxide via the ^2\Pi_u shape resonance

TL;DR

This study combines experimental momentum imaging and new theoretical calculations to elucidate the dissociative electron attachment process in CO2 via the 4 eV ^2\Pi_u shape resonance, revealing detailed dissociation dynamics.

Contribution

It provides a comprehensive analysis of the DEA process in CO2 using combined experimental and theoretical approaches, advancing understanding of resonance-mediated dissociation mechanisms.

Findings

Identification of the ^2\\Pi_u shape resonance at 4 eV in CO2

Detailed mapping of the dissociation pathway to CO and O^-

Agreement between experimental data and theoretical calculations

Abstract

Momentum imaging measurements from two experiments are presented and interpreted with the aid of new ab initio theoretical calculations to describe the dissociative electron attachment (DEA) dynamics. We address the problem of how the 4 eV ^2\Pi_u shape resonance in CO_2 proceeds to dissociate to CO(^1\Sigma^+) + O^-(^2P) by DEA.