Quantum interference in collision-induced energy transfer for CO (A¹Π, v=0/e³Σ⁻, v=1)–HCl (X¹Σ) system studied by OODR-MPI spectroscopy

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• 作者：Liu ; Jie ; Sun ; Mengtao ; Jiang ; Bo ; Sha ; Guohe
• 刊名：Chemical Physics Letters
• 出版年：2004
• 期刊代码：7_00092614
• 类别：ph
• 出版时间：April 21, 2004
• 卷：388
• 期：4-6
• 页码：306-311
• 文件大小：212 K

摘要

Quantum interference effect (QIE) in rotational energy transfer within CO (A¹Π,v=0/e³Σ⁻,v=1) mixed states in collision with HCl are observed with the interference phase angle θ_ST of 101 and 110° for ΔJ=±1 transition, respectively, from the initial J=12 and 13 states. In comparison with the previous similar experiments with He et al. as collision partner, which all give a θ_ST<90°, the interference for a same CO transition in collision with HCl changes from constructive to destructive or the reverse since cosθ_ST becomes negative. The bigger θ_ST may be explained by the long-range dipole–dipole interaction of proportional to R⁻³. The physical significance of θ_ST is discussed in some details.