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Quantum interference in H + HD → H2 + D between direct abstraction and roaming insertion pathways
Yurun Xie1,2, Hailin Zhao1, Yufeng Wang1
1State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
Quantum interference in the H + HD reaction reveals distinct pathways. This study highlights quantum interference effects influencing chemical reaction dynamics and probing geometric phase effects.
Area of Science:
- Chemical dynamics
- Quantum mechanics
- Physical chemistry
Background:
- Quantum interference is crucial for understanding chemical reaction dynamics.
- Topologically distinct pathways can lead to complex reaction outcomes.
Purpose of the Study:
- To investigate quantum interference between two distinct reaction pathways in the H + HD → H₂ + D reaction.
- To analyze the energy dependence of the differential cross section for specific product states.
Main Methods:
- Collision energy range: 1.94–2.21 eV.
- Observation of oscillations in the energy dependence of the differential cross section for H₂ (v'=2, j'=3) product in the backward scattering direction.
Main Results:
- Observed oscillations attributed to quantum interference between direct abstraction and roaming insertion pathways.
- Interference patterns sensitive to the geometric phase effect below the conical intersection.
Conclusions:
- Demonstrates the quantum nature of chemical reactivity.
- Highlights the role of quantum interference in probing subtle effects like geometric phase.
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