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Two-Dimensional Projected-Momentum Covariance Mapping for Coulomb Explosion Imaging
Joseph W McManus1, Felix Allum1, Josh Featherstone1
1Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
The Journal of Physical Chemistry. A
|April 12, 2024
Summary
We developed projected-momentum covariance mapping for 2D ion imaging. This method analyzes ion momentum projections, revealing distinct Coulomb explosion dynamics in 1,2-dichloroethene isomers for future photoisomerization studies.
Area of Science:
- Chemical Physics
- Molecular Dynamics
- Spectroscopy
Background:
- Covariance mapping is crucial for analyzing molecular fragmentation dynamics.
- Existing 3D momentum imaging techniques offer advanced analytical capabilities.
- 2D ion imaging studies require adapted methods for detailed dynamic analysis.
Purpose of the Study:
- To introduce projected-momentum covariance mapping for 2D ion imaging.
- To extend the analytical power of covariance mapping to 2D datasets.
- To investigate the Coulomb explosion dynamics of 1,2-dichloroethene isomers.
Main Methods:
- Developed projected-momentum covariance mapping technique.
- Applied the method to 2D ion imaging data.
- Utilized classical simulations to interpret results.
Main Results:
- Demonstrated the technique on cis- and trans-1,2-dichloroethene isomers.
- Unraveled distinct Coulomb explosion dynamics between isomers.
- Validated the utility of 2D projection analysis.
Conclusions:
- Projected-momentum covariance mapping enhances 2D ion imaging analysis.
- The method provides detailed insights into molecular fragmentation.
- This work sets the stage for time-resolved photoisomerization studies.
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