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arXiv 1002.1572physics.chem-phphysics.atm-clusphysics.atom-ph
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当衍射规则旋转非弹性碰撞的立体动力学

When diffraction rules the stereodynamics of rotationally inelastic collisions

Mikhail Lemeshko, Pablo G. Jambrina, Marcelo P. de Miranda, Bretislav Friedrich

摘要:

在我们最近对Ar-NO碰撞中的矢量相关性的研究[PCCP 12,1038(2010)]之后,我们将模型结果与He-NO系统的一系列通道和碰撞能量的密耦合计算进行了比较。模型和精确的极化矩之间的惊人的协议表明,在热能的旋转非弹性原子-分子碰撞的立体动力学是由物质波从原子-分子势的二维排斥核的衍射。此外,模型的极化力矩表征He-NO,He-O $_2$,He-OH,和He-CaH立体动力学被发现合并成一个单一的,独特的模式,这可以作为一个“指纹”,以确定衍射驱动的立体动力学在未来的工作。

英文摘要:

Following upon our recent work on vector correlations in the Ar-NO collisions [PCCP 12, 1038 (2010)], we compare model results with close-coupling calculations for a range of channels and collision energies for the He-NO system. The striking agreement between the model and exact polarization moments indicates that the stereodynamics of rotationally inelastic atom-molecule collisions at thermal energies is governed by diffraction of matter waves from a two-dimensional repulsive core of the atom-molecule potential. Furthermore, the model polarization moments characterizing the He-NO, He-O$_2$, He-OH, and He-CaH stereodynamics are found to coalesce into a single, distinctive pattern, which can serve as a "fingerprint" to identify diffraction-driven stereodynamics in future work.

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