# Electron Correlation Effects in Attosecond Photoionization of CO$_{2}$

## TL;DR

This paper investigates how multi-electron interactions influence attosecond-scale photoionization delays in CO₂, revealing effects of autoionization and shape resonances on electron escape times.

## Contribution

It combines experimental measurement techniques with theoretical calculations to elucidate electron correlation effects in molecular photoionization.

## Key findings

- Electron correlation impacts time delays via autoionization of Rydberg states.
- Shape resonances accelerate electron escape, affecting measured delays.
- Multi-electron dynamics are significant in attosecond photoionization of CO₂.

## Abstract

A technique for measuring photoionization time delays with attosecond precision is combined with calculations of photoionization matrix elements to demonstrate how multi-electron dynamics affect photoionization time delays in carbon dioxide. Electron correlation is observed to affect the time delays through two mechanisms: autoionization of molecular Rydberg states and accelerated escape from a continuum shape resonance.