Related Experiment Video
Updated: Sep 14, 2025

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Multielectron dynamics, polarization, and Stark shifts for carbon monoxide molecule and molecular ions in a strong
Evan C Jones1, Cara McDonald1, Jimmy Williams1
1Department of Physics and Astronomy University of Delaware, Newark, Delaware 19716, USA.
Abstract:
The ionization of CO, CO+, and CO2+ are quantified in an ultrafast, strong laser field. Measurements were performed over the intensity range from 1014 to 1017 W cm-2. Across this span, the intensity-dependent ionization yields were quantified over eight orders of magnitude in the dynamic range. Both sequential and (e, 2e) nonsequential ionization processes were observed. We calculate the electron states for CO and its molecular ions interacting with a strong laser field using a traditional field-free approach, the single active electron approximation, and present the results for the all-electron interaction of CO with the laser field. By comparing the calculated ionization with the experimental yields, we determined that the electron wave function polarization and Stark shifts were accurately treated with an all-electron Hartree-Fock calculation. The calculated field-molecule interaction included the core electron polarizability, which is not captured using field-free or frozen-core single-electron approximation.
Related Concept Videos
π Electron Effects on Chemical Shift: Overview
UV–Vis Spectroscopy: Molecular Electronic Transitions
¹H NMR: Interpreting Distorted and Overlapping Signals
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
NMR Spectroscopy: Spin–Spin Coupling
Molecular Spectroscopy: Absorption and Emission

