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The Interaction-Asymptotic Region Decomposition Method in Jacobi Coordinates: Triatomic Reactive Scatterings
Yajian Shu1,2, Hailin Zhao1, Zhigang Sun1
1State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
The interaction-asymptotic region decomposition (IARD) technique now uses Jacobi coordinates for improved reactive scattering calculations. This enhanced method efficiently handles complex reactions, offering accurate results with simpler calculations.
Area of Science:
- Chemical Physics
- Quantum Chemistry
- Computational Chemistry
Background:
- The coordinate problem in reactive scattering calculations has been a long-standing challenge.
- The interaction-asymptotic region decomposition (IARD) technique offers a viable solution.
- Previous IARD implementations utilized hyperspherical coordinates.
Purpose of the Study:
- To develop a new implementation of the IARD technique using Jacobi coordinates for the interaction region.
- To assess the efficiency and accuracy of this novel approach for triatomic reactive scatterings.
- To demonstrate the method's capability in handling challenging reactions with low translational energy products.
Main Methods:
- The interaction-asymptotic region decomposition (IARD) technique was adapted using Jacobi coordinates.
- An intermediate interpolation method was developed to transform wave functions between regions.
- The method was applied to calculate differential cross sections and state-resolved reaction probabilities.
Main Results:
- The new IARD implementation with Jacobi coordinates is efficient and accurate for triatomic reactive scatterings.
- The method successfully calculated challenging reaction dynamics, including those with low translational energy products.
- Numerical examples for H+H2, F+HD, and 16O+36O2 reactions validated the approach.
Conclusions:
- The developed IARD technique with Jacobi coordinates provides a robust and physically intuitive method for reactive scattering.
- This approach overcomes limitations of single-coordinate methods for complex chemical reactions.
- The findings pave the way for more accessible and accurate computational studies in chemical dynamics.
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