Differential cross sections of F+HD → DF+H reaction at collision energies from 3.03 MeV to 17.97 MeV

Wang，Heilong1; Li，Yu1,2; Jiao，Zhirun1,2; Zhang，Hongtao1,4; Xiao，Chunlei1,4; Yang，Xueming1,3

2021-12-01

10.1063/1674-0068/cjcp2111232

化学物理学报   影响因子和分区

1674-0068

2327-2244

The prototypical reaction of F+HD→DF+H was investigated at collision energies from 3.3 meV to 17.97 meV using a crossed molecular beam apparatus with multichannel Rydberg tagging time-of-flight detection. Significant contributions from both the Born-Oppenheimer (BO) forbidden reaction F*(2P1/2)+HD→DF+H and the BO-allowed reaction F(2P3/2)+HD→DF+H were observed. In the backward scattering direction, the contribution from the BO-forbidden reaction F*(2P1/2)+HD was found to be considerably greater than the BO-allowed reaction F(2P3/2)+HD, indicating the non-adiabatic effects play an important role in the dynamics of the title reaction at low collision energies. Collision-energy dependence of differential cross sections (DCSs) in the backward scattering direction was found to be monotonously decreased as the collision energy decreases, which does not support the existence of resonance states in this energy range. DCSs of both BO-allowed and BO-forbidden reactions were measured at seven collision energies from 3.03 meV to 17.97 meV. It is quite unexpected that the angular distribution gradually shifts from backward to sideway as the collision energy decreases from 17.97 meV to 3.03 meV, suggesting some unknown mechanisms may exist at low collision energies.

SCI ; EI

英语

通讯

WOS:000757254900029

20220511578345

Backscattering ; Molecular beams

Atomic and Molecular Physics:931.3

2-s2.0-85123840465

Scopus

1.State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,116023,China
2.School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing,100049,China
3.College of Science,Southern University of Science and Technology,Shenzhen,518055,China
4.Department of Chemical Physics,University of Science and Technology of China,Hefei,230026,China

Wang，Heilong,Li，Yu,Jiao，Zhirun,et al. Differential cross sections of F+HD → DF+H reaction at collision energies from 3.03 MeV to 17.97 MeV[J]. 化学物理学报,2021,34(6):925-931.

Wang，Heilong,Li，Yu,Jiao，Zhirun,Zhang，Hongtao,Xiao，Chunlei,&Yang，Xueming.(2021).Differential cross sections of F+HD → DF+H reaction at collision energies from 3.03 MeV to 17.97 MeV.化学物理学报,34(6),925-931.

Wang，Heilong,et al."Differential cross sections of F+HD → DF+H reaction at collision energies from 3.03 MeV to 17.97 MeV".化学物理学报 34.6(2021):925-931.