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利用光学双共振多光子电离技术在CO(A~1Ⅱ,e~3∑~-)混合态分子内传能中观测到碰撞过程中的量子干涉效应。导出的混合态传能截面的表达式中显含干涉项,并引入了干涉相位角θ_(ST)的概念来表征单重态和三重态两个传能通道的相于程度。在不同温度下,对一些单原子或双原子分子作为碰撞伴时的θ_(ST)进行了测量,测量结果揭示了不同分子间碰撞相互作用的动态学信息。
The optical double resonance multi-photon ionization technique was used to observe the quantum interference effect during the collision in CO (A ~ 1Ⅱ, e ~ 3Σ ~ -) mixed intramolecular energy transfer. The expression of the mixed-state energy transfer cross section has the interference term, and introduces the concept of the interference phase angle θ ST to characterize the phase relationship between the singlet and triplet energy transfer channels. At different temperatures, θ_ (ST) of some monoatomic or diatomic molecules as collision partners was measured. The measurement results revealed the dynamic information of the collision between different molecules.