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Visualize the vibronic coupling in Auger final states in N2 molecule
Jianye Huang1,2, Bocheng Ding1,2, Yunfei Feng1,2
1School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
The Journal of Chemical Physics
|April 24, 2023
Summary
This study provides the first experimental evidence of vibronic coupling in N2 molecules. Researchers identified vibronic coupling between resonant Auger final states, overcoming challenges in quantitative evaluation and experimental proof.
Area of Science:
- Chemical Physics
- Molecular Spectroscopy
- Quantum Chemistry
Background:
- Vibronic coupling is crucial in chemical reactions but difficult to quantify and prove experimentally.
- Challenges include mathematical complexity, programming difficulty, and overlapping spectral states.
Purpose of the Study:
- To provide the first experimental proof of vibronic coupling in N2 molecules.
- To overcome the experimental challenges of state overlap and quantitative evaluation.
Main Methods:
- Excitation of vibrational levels (ν = 0, 1, 2) in the N 1s→πg* core-excited state of N2.
- Separation of resonant Auger decay channels using 2D energy correlation maps.
- Analysis of kinetic energy release spectra at different vibrational quantum numbers.
Main Results:
- Successfully separated resonant Auger decay channels leading to the lowest dissociation limit.
- Obtained kinetic energy release spectra for distinct vibrational quantum numbers.
- Provided the first experimental demonstration of vibronic coupling between 1²Πg and 2²Πg resonant Auger final states in N2.
Conclusions:
- Vibronic coupling between specific resonant Auger final states in N2 has been experimentally confirmed.
- The methodology offers a pathway for studying vibronic coupling in other molecular systems.
- This finding advances the understanding of electron dynamics and energy transfer in molecules.
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