High Resolution Crossed Molecular Beams Study of the H+HD→H2+D Reaction
- Received Date: 2019-01-12
- Crossed molecular beams, Velocity map ion imaging, Threshold ionization, Forward scattering oscillations, High resolution, Differential cross sections
Abstract: The H+H2 reaction is the simplest chemical reaction system and has long been the prototype model in the study of reaction dynamics. Here we report a high resolution experimental investigation of the state-to-state reaction dynamics in the H+HD→H2+D reaction by using the crossed molecular beams method and velocity map ion imaging technique at the collision energy of 1.17 eV. D atom products in this reaction were probed by the near threshold 1+1'(vacuum ultraviolet+ultraviolet) laser ionization scheme. The ion image with both high angular and energy resolution were acquired. State-to-state differential cross sections was accurately derived. Fast forward scattering oscillations, relating with interference effects in the scattering process, were clearly observed for H2 products at H2(v'=0，j'=1) and H2(v'=0，j'=3) rovibrational levels. This study further demonstrates the importance of measuring high-resolution differential cross sections in the study of state-to-state reaction dynamics in the gas phase.
|Citation:||Ji-wei Sang, Dao-fu Yuan, Wen-tao Chen, Sheng-rui Yu, Chang Luo, Si-wen Wang, Tao Wang, Xue-ming Yang, Xing-an Wang. High Resolution Crossed Molecular Beams Study of the H+HD→H2+D Reaction[J]. Chinese Journal of Chemical Physics , 2019, 32(1): 123-128. doi: 10.1063/1674-0068/cjcp1901010|