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Dipolar dissociation dynamics in electron collisions with carbon monoxide
Dipayan Chakraborty1, Pamir Nag1, Dhananjay Nandi1
1Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India. dhananjay@iiserkol.ac.in.
Physical Chemistry Chemical Physics : PCCP
|November 26, 2016
Summary
Electron collisions with carbon monoxide were studied to understand dipolar dissociation. Researchers identified two ion-pair states using advanced imaging techniques, revealing detailed dynamics of negative ion formation.
Area of Science:
- Atomic and Molecular Physics
- Chemical Physics
Background:
- Electron-molecule collisions are fundamental to understanding chemical reactions and material properties.
- Carbon monoxide (CO) is a key molecule in atmospheric and industrial chemistry, making its collision dynamics of significant interest.
Purpose of the Study:
- To investigate the dipolar dissociation processes in electron collisions with carbon monoxide.
- To characterize the ion-pair production pathways and dynamics.
Main Methods:
- Utilized time-of-flight (TOF) mass spectroscopy.
- Employed the highly differential velocity slice imaging (VSI) technique for detailed analysis.
Main Results:
- Detected both positive and negative ions resulting from ion-pair states.
- Determined the threshold energy for ion-pair production from the negative ion yield curve.
- Analyzed kinetic energy and angular distributions of fragment anions to reveal dissociation dynamics.
- Identified two distinct ion-pair states based on angular distribution measurements.
Conclusions:
- The study provides detailed insights into the dynamics of dipolar dissociation in electron-CO collisions.
- The identified ion-pair states offer a deeper understanding of fragmentation mechanisms in molecules.
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