Isotope-Dependent Rotational States Distributions Enhanced by Dynamic Resonance States: A Comparison Study of the F + HD 鈫?HF(vHF = 2) + D and F + H2 鈫?HF(vHF<

详细信息    查看全文

• 作者：Tao Wang ; Tiangang Yang ; Chunlei Xiao ; Zhigang Sun ; Long Huang ; Dongxu Dai ; Xueming Yang ; Dong H. Zhang
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2014
• 出版时间：September 4, 2014
• 年：2014
• 卷：5
• 期：17
• 页码：3049-3055
• 全文大小：455K
• ISSN：1948-7185

文摘

An interesting trimodal structure in the HF (v鈥?= 2) rotational distribution produced by the F + HD (v = 0, j = 0) reaction, but monomodal structure in the HF (v鈥?= 2) rotational distribution produced by the F + H₂ (v = 0, j = 0) reaction, were observed using a high-resolution crossed molecular beam apparatus. The rotational states of product HF (v鈥?= 2) are much hotter in the F + HD reaction. It is uncovered that the observations are due to the dominant role of the dynamical resonance states in these two isotopic reactions. The angular potential well in the region of the resonance state of the F + HD reaction is much deeper and supports wave function with high angular kinetic energy, which in turn comes from different H tunneling processes in the F + HD and F + H₂ reaction.

Keywords:

Reactive Resonance; F + H₂ Reaction; Isotope Effects; Crossed Molecular Beam; Rotational State Distribution; Reaction Dynamics